Efficient degradation of methylene blue dye by catalytic oxidation using the Na_8Nb_6O_19.13H_2O/H_2O-2 system

Chengtang Liu,Huaming Li,Hui Xu,Ling Liu,Li Xu,Zhixiang Ye 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.4

Na_8Nb_6O_19.13H_2O particles were synthesized by a simple hydrothermal method. The catalysts were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and thermogravimetric and differential scanning (TG-DSC). The XRD and TG-DSC analyses indicated that Na_8Nb_6O_19.13H-2O was an intermediate hexaniobate during the preparation of NaNbO_3 powders. Methylene blue (MB) dye degradation using Na_8Nb_6O_19.13H_2O/H_2O_2,Nb_2O_5/H_2O_2 and NaNbO_3/H_2O_2 systems were investigated, respectively. Among the catalytic oxidation systems, Na_8Nb_6O_19·13H_2O showed the highest activity for degradation of MB in the presence of H_2O_2. The results indicated that the dye degradation efficiency could be 93.5% at 30 ℃ after 60 min in the presence of the Na_8Nb_6O_19·13H_2O/H_2O-2 system. It was also found that the degradation of MB over the catalytic systems followed pseudo-first-order kinetics, and the degradation rate was 0.02376 min−1 in the Na_8Nb_6O_19.13H_2O/H_2O_2 system, which was higher than that in the Nb_2O_5/H_2O_2and NaNbO_3/H_2O_2 systems. A possible mechanism for MB catalytic oxidation degradation using the Na_8Nb_6O_19.13H-2O/H_2O_2 system was proposed.

지구 대기 중 H2O, O2 등가폭의 일중 변화

강동일 한국지구과학회 2010 한국지구과학회지 Vol.31 No.4

The scattered light of solar radiance near the infrared ray area was observed to measure H2O and O2 absorption lines. The changes of H2O and O2 equivalent width were calculated on the basis of the measurement. O2 equivalent width showed negative correlation with the amount of solar radiance; O2 equivalent width had a tendency to diminish as the amount of the solar radiance increased and to increase as the amount of the solar radiance decreased. On the other hand,H2O equivalent width showed the positive correlation with the amount of solar radiance. Especially it was noted that the sum of equivalent width of absorption lines created by H2O and O2 in a day was fairly constant. It is implied that the constant equivalent width is caused by the complementary development of photodissociation and recombination in O2 and H2O. 태양 복사의 지구 대기 산란광을 근 적외선 영역에서 분광 관측하여 H2O와 O2 흡수선을 측정하고 이것으로 태양 복사량에 따른 두 기체의 등가폭 변화를 계산하였다. O2는 태양 복사량이 증가할수록 등가폭이 줄어들고 복사량이감소할수록 커지는 경향을 보였고, H2O는 그 반대의 경향을 보였다. 특히 두 기체가 만드는 흡수선 등가폭의 합은 하루 중에 대체로 일정한 경향을 보였다. 본 연구에서는 이것이 태양광에 의한 광해리와 재결합이 O2와 H2O에 있어서상호 보완적으로 일어나기 때문으로 추측한다.

H₂O_n-H₂O_m (n=1-4, m=1-4) 이중합체의 수소결합에 따른 구조적 특성 및 결합에너지에 관한 이론 연구

송희성,서현일,신창호,김승준,Song, Hui-Seong,Seo, Hyun-Il,Shin, Chang-Ho,Kim, Seung-Joon 대한화학회 2015 대한화학회지 Vol.59 No.2

Hydrogen polyoxide, $H_2O_n-H_2O_m$(n=1-4, m=1-4) 이중합체(dimer)의 분자 구조 변화에 따른 수소결합(H-bonding) 효과를 순 이론적(ab initio) 방법과 밀도 범함수 이론(DFT)으로 계산하였다. 분자 구조는 B3LYP, CAM-B3LYP, MP2의 양자역학적 방법들을 사용하여 최적화하였으며, 진동주파수를 계산하여 최저에너지(true local minimum) 구조인 것을 확인하였다. 보다 정확한 수소결합 에너지(${\Delta}E$) 계산을 위하여 CCSD(T) 이론수준에서 한 점(single-point) 에너지 계산을 하였으며, 영점 진동에너지(ZPVE) 보정과 바탕집합 중첩에러(BSSE) 보정을 하였다. CCSD(T)/cc-pVTZ 이론 수준에서 $H_2O_4-H_2O_3$이 8.18 kcal/mol로 가장 강한 결합을 나타내었으며, 물 이중합체($H_2O-H_2O$)는 3.00 kcal/mol로 가장 약한 결합에너지를 나타내었다. The DFT and ab initio calculations have been performed to elucidate hydrogen interaction of hydrogen polyoxide dimers, $H_2O_n-H_2O_m$ (n=1-4, m=1-4). The optimized geometries, harmonic vibrational frequencies, and binding energies are predicted at various levels of theory. The harmonic vibrational frequencies of the molecules considered in this study show all real numbers implying true minima. The higher-order correlation effect were discussed to compare MP2 result with CCSD(T) single point energy. The binding energies were corrected for the zero-point vibrational energy (ZPVE) and basis set superposition errors (BSSE). The largest binding energy predicted at the CCSD(T)/cc-pVTZ level of theory is 8.18 kcal/mol for $H_2O_4-H_2O_3$ and the binding energy of water dimer is predicted to be 3.00 kcal/mol.

La₂O₃가 첨가된 Pd/TiO₂ 촉매의 개발 및 H₂ 상온산화 반응에서의 성능 향상 연구

이동윤 ( Dong Yoon Lee ),김성철 ( Sung Chul Kim ),이상문 ( Sang Moon Lee ),김성수 ( Sung Su Kim ) 한국공업화학회 2020 공업화학 Vol.31 No.6

본 연구에서는 상온 조건에서 추가적인 에너지원 없이 H₂ 산화가 가능한 Pd/TiO₂ 촉매를 제조하였고, 지지체인 TiO₂의 비표면적은 Pd/TiO₂ 촉매의 H₂ 산화 반응 성능과 비례하지는 않은 것을 확인하였다. 또한 촉매의 물성 변화에 의한 성능 영향 평가를 위하여 La₂O₃를 Pd/TiO₂ 촉매에 첨가하였다. La₂O₃를 TiO₂에 함량별로 첨가하여 Pd/La₂O₃-TiO₂를 제조하였고, CO chemisorption 분석을 진행하였다. Pd/TiO₂ (G) 촉매의 전환율(14% at 0.5% H₂)과 비교하여 Pd/La₂O₃-TiO₂ 촉매가 74% 전환율로 5배 이상의 성능 증진이 나타났다. Pd/La₂O₃-TiO₂ 촉매는 활성금속인 Pd의 metal dispersion이 클수록 H₂ 산화반응에 유리한 것으로 분석되었다. 하지만 첨가되는 La2O3가 10%를 초과하게 되면 촉매 성능이 다시 감소하는 것을 알 수 있었다. 마지막으로 Pd/La₂O₃-TiO₂ 촉매의 물성이 지배적인 영향을 미치는 것은 주입되는 H₂가 0.3~0.5% 농도 조건까지이며, 1% 이상의 H₂ 농도부터는 물질전달이 촉매 반응속도를 지배하는 것으로 판단된다. In this study, a Pd/TiO₂ catalyst which oxidized H₂ at room temperature without an additional energy source was prepared. And a specific surface area of TiO₂ as a support was not proportional to H₂ oxidation reaction performance of Pd/TiO₂ catalyst. In addition La₂O₃ was added to Pd/TiO₂ catalyst in order to evaluate the performance effect due to the change of catalysts physical properties. A Pd/La₂O₃-TiO₂ was prepared by adding different amounts of La₂O₃ to TiO₂ and CO chemisorption analysis was performed. Compared to the conversion rate (14% at 0.5% H₂) of the Pd/TiO₂ (G) catalyst, the Pd/La₂O₃-TiO₂ catalyst showed 74% which was improved by more than five times. It was found that the larger the metal dispersion of Pd as an active metal is, the more favorable to H₂ oxidation reaction is. However, when the added La₂O₃ amount exceeded 10%, the catalyst performance decreased again. Finally, it was concluded that the physical properties of the Pd/La₂O₃-TiO₂ catalyst have a dominant influence on the catalytic activity until 0.3~0.5% of injected H₂ concentrations and the catalyst reaction rate was controlled by substance transfer from 1% or more concentrations of H₂.

H₂O₃과 물(H₂O) 클러스터들의 분자구조와 열역학적 안정성에 대한 이론적 연구

서현일,김종민,송희성,김승준,Seo, Hyun-il,Kim, Jong-Min,Song, Hui-Sung,Kim, Seung-Joon 대한화학회 2017 대한화학회지 Vol.61 No.6

$H_2O_3(H_2O)_n$ (n=1-5) 클러스터들에 대해서 밀도 범함수 이론(DFT)과 순 이론(ab initio) 방법을 cc-pVD(T)Z 바탕집합(basis set)과 함께 사용하여 가능한 여러 구조를 최적화하고 결합에너지와 조화진동수를 계산하였다. $H_2O_3$ 단량체의 경우 CCSD(T)/ccp-VTZ 이론 수준에서 트랜스(trans) 구조가 시스(cis) 구조보다 더 안정한 것으로 계산되었다. 클러스터에 대해서는 MP2/cc-pVTZ 수준까지 분자 구조를 최적화하고 열역학적으로 가장 안정한 분자구조를 예측하였다. 클러스터의 결합에너지는 CCSD(T)//MP2 수준에서 영점 진동에너지(ZPVE)와 바탕집합 중첩에러(BSSE)를 모두 보정한 후 n=1일 때 -6.39 kcal/mol 계산 되었으며 이 같은 결과는 $H_2O$와 $H_2O_2$의 물 클러스터 보다 더 좋은 수소 주게 즉 산(acid)으로서 작용할 것으로 기대된다. 물 분자 1개 당 평균 결합에너지는 n=2의 경우 8.25 kcal/mol, n=3일 때 7.22 kcal/mol, n=4의 경우 8.50 kcal/mol 그리고 n=5의 경우 8.16 kcal/mol로 계산되었다. The density functional theory(DFT) and ab initio calculations have been applied to investigate hydrogen interaction of $H_2O_3(H_2O)_n$ clusters(n=1-5). The structures, IR spectra, and H-bonding energies are calculated at various levels of theory. The $trans-H_2O_3$ monomer is predicted to be thermodynamically more stable than cis form at the CCSD(T)/cc-pVTZ level of theory. For clusters, the geometries are optimized at the MP2/cc-pVTZ level of theory. The binding energy of $H_2O_3-H_2O$ cluster is predicted to be -6.39 kcal/mol at the CCSD(T)//MP2/cc-pVTZ level of theory after zero-point vibrational energy (ZPVE) and basis set superposition error (BSSE) correction. This result implies that $H_2O_3$ is a stronger proton donor(acid) than either $H_2O$ or $H_2O_2$. The average binding energies per $H_2O$ are predicted to be 8.25 kcal/mol for n=2, 7.22 kcal/mol for n=3, 8.50 kcal/mol for n=4, and 8.16 kcal/mol for n=5.

Effects of antioxidants and MAPK inhibitors on cell death and reactive oxygen species levels in H ₂ O ₂ -treated human pulmonary fibroblasts

D.A. Spandidos 2013 Oncology letters Vol.5 No.5

<P>H<SUB>2</SUB>O<SUB>2</SUB>-induced cytotoxicity in normal human pulmonary fibroblasts (HPFs) is of interest in toxicological research since HPFs are involved in lung inflammation, fibrosis and cancer. The present study investigated the cytotoxic effects of H<SUB>2</SUB>O<SUB>2</SUB> on normal HPFs in relation to reactive oxygen species (ROS) and mitogen-activated protein kinases (MAPKs) using the well-known antioxidants N-acetyl cysteine (NAC) and propyl gallate (PG), as well as MAPK inhibitors. Treatment with 50 <I>μ</I>M H<SUB>2</SUB>O<SUB>2</SUB> inhibited the growth of the HPFs by ∼45% in 24 h. H<SUB>2</SUB>O<SUB>2</SUB> induced cell death via apoptosis and triggered the loss of mitochondrial membrane potential (MMP; Δψ<SUB>m</SUB>) in the HPFs. H<SUB>2</SUB>O<SUB>2</SUB> also increased the ROS levels, including O<SUB>2</SUB><SUP>•−</SUP>, in the HPFs and induced glutathione (GSH) depletion. NAC and PG attenuated the death of the HPFs and the loss of MMP (Δψ<SUB>m</SUB>) through the use of H<SUB>2</SUB>O<SUB>2</SUB>. NAC decreased the ROS levels in the H<SUB>2</SUB>O<SUB>2</SUB>-treated HPFs and PG markedly prevented an increase in O<SUB>2</SUB><SUP>•−</SUP> levels in these cells. However, PG alone induced cell death in the HPF control cells and increased the ROS levels in these cells. None of the MAPK (MEK, JNK and p38) inhibitors affected cell growth inhibition or cell death by H<SUB>2</SUB>O<SUB>2</SUB>. In addition, these inhibitors did not significantly affect the ROS levels and GSH depletion in the H<SUB>2</SUB>O<SUB>2</SUB>-treated HPFs. In conclusion, H<SUB>2</SUB>O<SUB>2</SUB> induced growth inhibition and cell death in the HPFs via GSH depletion. NAC and PG attenuated H<SUB>2</SUB>O<SUB>2</SUB>-induced HPF cell death but each regulated the ROS levels in a different manner. Treatment with MAPK inhibitors did not affect cell death or the ROS levels in the H<SUB>2</SUB>O<SUB>2</SUB>-treated HPFs.</P>

MAPK Activation and Cell Viability after H<SUB>2</SUB>O<SUB>2</SUB> Stimulation in Cultured Feline Ileal Smooth Muscle Cells

Hyun Ju Song,Ji Hoon Jeong,Dong Kyu Lee,Tai Sang Lee,Young Sil Min,Uy Dong Sohn 대한생리학회-대한약리학회 2004 The Korean Journal of Physiology & Pharmacology Vol.8 No.6

Recent data have shown the importance of oxidative stresses in the pathogenesis of inflammatory bowel disease, crohn s disease and ulcerative colitis. H<SUB>2</SUB>O<SUB>2</SUB>, reactive oxygen species (ROS) donor, has been reported to act as a signaling molecule involved in a variety of cellular functions such as apoptosis and proliferation. In the present study, we investigated viability of cultured ileal smooth muscle cells (ISMC) after stimulation with H<SUB>2</SUB>O<SUB>2</SUB>. Trypan blue method revealed that the cell viability of ISMC treated with 1 mM H<SUB>2</SUB>O<SUB>2</SUB> was not different from that of controls at up to 2 h time point, while treatment of ISMC with 1 mM H<SUB>2</SUB>O<SUB>2</SUB> for 48 h finally induced significant decrease in the cell viability. Therefore, we evaluated whether H<SUB>2</SUB>O<SUB>2</SUB> was capable of ERKs activation in ISMC for the short-term exposure and examined whether tyrosine kinase was involved in the process of ERK activation by H<SUB>2</SUB>O<SUB>2</SUB> in ISMC. We also investigated the effects of H<SUB>2</SUB>O<SUB>2</SUB> on activation of SAPK/JNK and p38 MAP kinase in ISMC. Thus, ISMC were cultured and exposed to H<SUB>2</SUB>O<SUB>2</SUB>, and western blot analysis was performed with phospho- specific MAP kinase antibodies. Robust activation of ERK occurred within 30 min of 1 mM H<SUB>2</SUB>O<SUB>2</SUB> treatment. H<SUB>2</SUB>O<SUB>2</SUB>-induced ERK activation was attenuated by a tyrosine kinase inhibitor, genistein, indicating that tyrosine kinase was probably involved in the ERK activation by H<SUB>2</SUB>O<SUB>2</SUB>. H<SUB>2</SUB>O<SUB>2</SUB> was a moderate activator of SAPK/JNK, while p38 MAP kinase was not activated by H<SUB>2</SUB>O<SUB>2</SUB>. We suggest that ERK activation induced by short-term H<SUB>2</SUB>O<SUB>2</SUB> treatment plays a critical role in cellular protection in the early stage of response to oxidative stress. The present study suggests the necessity of identification of MAPK signaling pathways affected by ROS, since it could ultimately elucidate cellular consequences involved in initiation and perpetuation of intestinal tissue damage in the diseases such as crohn s disease and ulcerative colitis, resulted from excessive ROS.

H2O3과 물(H2O) 클러스터들의 분자구조와 열역학적 안정성에 대한 이론적 연구

서현일,김종민,송희성,김승준 대한화학회 2017 대한화학회지 Vol.61 No.6

The density functional theory(DFT) and ab initio calculations have been applied to investigate hydrogen interaction of H2O3(H2O)n clusters(n=1-5). The structures, IR spectra, and H-bonding energies are calculated at various levels of theory. The trans-H2O3 monomer is predicted to be thermodynamically more stable than cis form at the CCSD(T)/cc-pVTZ level of theory. For clusters, the geometries are optimized at the MP2/cc-pVTZ level of theory. The binding energy of H2O3-H2O cluster is predicted to be -6.39 kcal/mol at the CCSD(T)//MP2/cc-pVTZ level of theory after zero-point vibrational energy (ZPVE) and basis set superposition error (BSSE) correction. This result implies that H2O3 is a stronger proton donor(acid) than either H2O or H2O2. The average binding energies per H2O are predicted to be 8.25 kcal/mol for n=2, 7.22 kcal/mol for n=3, 8.50 kcal/mol for n=4, and 8.16 kcal/mol for n=5. H2O3(H2O)n (n=1-5) 클러스터들에 대해서 밀도 범함수 이론(DFT)과 순 이론(ab initio) 방법을 cc-pVD(T)Z 바탕집합(basis set)과 함께 사용하여 가능한 여러 구조를 최적화하고 결합에너지와 조화진동수를 계산하였다. H2O3 단량체의 경우 CCSD(T)/ccpVTZ 이론 수준에서 트랜스(trans) 구조가 시스(cis) 구조보다 더 안정한 것으로 계산되었다. 클러스터에 대해서는 MP2/cc-pVTZ 수준까지 분자 구조를 최적화하고 열역학적으로 가장 안정한 분자구조를 예측하였다. 클러스터의 결합에너지는 CCSD(T)//MP2 수준에서 영점 진동에너지(ZPVE)와 바탕집합 중첩에러(BSSE)를 모두 보정한 후 n=1일 때 −6.39 kcal/mol 계산 되었으며 이 같은 결 과는 H2O와 H2O2의 물 클러스터 보다 더 좋은 수소 주게 즉 산(acid)으로서 작용할 것으로 기대된다. 물 분자 1개 당 평균 결합 에너지는 n=2의 경우 8.25 kcal/mol, n=3일 때 7.22 kcal/mol, n=4의 경우 8.50 kcal/mol 그리고 n=5의 경우 8.16 kcal/mol로 계산되 었다.

Grasping periodic trend and rate-determining step for S-modified metals of metal sulfides deployable to produce OH via H₂O₂ cleavage

Kim, Jongsik,Choe, Yun Jeong,Kim, Sang Hoon,Lee, Seung-Cheol,Bhattacharjee, Satadeep Elsevier BV 2019 Applied Catalysis B Vol. No.

<P><B>Abstract</B></P> <P>Iron sulfides are fascinating catalytic phases because these include S-modified Fe<SUP>δ+</SUP> (δ ≤ 2) species functioning as H<SUB>2</SUB>O<SUB>2</SUB> activators to form <SUP> </SUP>OH used for oxidatively degrading aqueous contaminants (e.g., phenol). As an initial step for locating S-modified metal species (M<SUP>δ+</SUP>) that outperform Fe<SUP>δ+</SUP> in catalytic H<SUB>2</SUB>O<SUB>2</SUB> cleavage, hexagonal metal sulfides (MS) were synthesized using Mn, Fe, Co, Ni, and Cu to understand electric potential-assisted H<SUB>2</SUB>O<SUB>2</SUB> scission kinetics on M<SUP>δ+</SUP> species. Ni<SUP>δ+</SUP> species were found to show the greatest <SUP> </SUP>OH productivity among all M<SUP>δ+</SUP> species studied, mainly resulting from the Lewis acidic nature of Ni<SUP>δ+</SUP> species adequate to expedite the liberation of <SUP> </SUP>OH species. This was partially evidenced by H<SUB>2</SUB>O<SUB>2</SUB> activation/phenol degradation runs on M<SUP>δ+</SUP> species, wherein initial H<SUB>2</SUB>O<SUB>2</SUB> activation rate (-r<SUB>H2O2,0</SUB>) or initial phenol degradation rate (-r<SUB>PHENOL,0</SUB>) of Ni<SUP>δ+</SUP> species was 3–9 times those of the other M<SUP>δ+</SUP> species. Ni<SUP>δ+</SUP> species, therefore, were located in the middle of the volcano-shaped curve plotting -r<SUB>H2O2,0</SUB> (or -r<SUB>PHENOL,0</SUB>) versus the type of M<SUP>δ+</SUP>. Kinetic assessment of M<SUP>δ+</SUP> species under fine-tuned reaction environments also showed that regardless of varying H<SUB>2</SUB>O<SUB>2</SUB> concentrations, M<SUP>δ+</SUP> species were found to retain their -r<SUB>H2O2,0</SUB> values in the absence of electric potentials. Conversely, M<SUP>δ+</SUP> species could enhance -r<SUB>PHENOL,0</SUB> values at larger electric potentials, where greater energies were likely exerted on M<SUP>δ+</SUP> species. This indeed corroborated that <SUP> </SUP>OH desorption from M<SUP>δ+</SUP> species was the rate-determining step to direct catalytic H<SUB>2</SUB>O<SUB>2</SUB> scission. In addition to heterogeneous catalytic nature of Ni<SUP>δ+</SUP> species in fragmenting H<SUB>2</SUB>O<SUB>2</SUB>, outstanding H<SUB>2</SUB>O<SUB>2</SUB> scission ability provided by Ni<SUP>δ+</SUP> species could also compensate for their moderate catalytic stability at pH-neutral condition.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Metal sulfides (MS) consisting of S-modified Group IV metals such as Mn, Fe, Co, Ni, and Cu. </LI> <LI> Ni<SUP>δ+</SUP> of NiS (δ ≤ 2) with the greatest initial H<SUB>2</SUB>O<SUB>2</SUB> scission rate to produce <SUP> </SUP>OH (-r<SUB>H2O2, 0</SUB>). </LI> <LI> Ni<SUP>δ+</SUP> of NiS located in the center of a volcano-shaped curve plotting –r<SUB>H2O2,0</SUB> versus M<SUP>δ+</SUP>. </LI> <LI> M<SUP>δ+</SUP> of metal sulfides with the rate-determining step of <SUP> </SUP>OH desorption to direct phenol degradation. </LI> <LI> Ni<SUP>δ+</SUP> of NiS with the greatest initial phenol degradation rate with the moderate recyclability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Al2O3 담체상에서 귀금속 촉매의 H2O-H2 Pretreatment 영향

김문찬,강경호 한국특허학회 2007 특허학연구 : 한국특허학회지 Vol.9 No.1

VOC는 대기오염의 주원인으로서 인식되어왔다. 촉매산화는 저온에서 높은 효율을 나타내기 때문에 VOCs 제거를 위한 가장 중요한 처리기술중 하나이다. 본 연구에서는 γ-Al2O3 담체에 Pt, Pt-Ru 그리고 Pt-Ir을 담지 시켜 촉매를 제조하였다. 금속 분산에 따르면 H2O-H2 처리방법이 사용되었고, 반응물로서 xylene, toluene 그리고 MEK를 사용하였다. 단일 또는 두 가지 이상의 촉매들은 함침법에 의해 준비하였고, XRD, XPS, TEM 분석을 통하여 특성화하였다. VOCs산화에서, Pt-Ru, Pt-Ir 촉매는 다양한 활성점을 나타내었고 그것은 Pt의 metal 영역를 강화시켰다. 따라서 두 가지 금속으로 이루어진 촉매가 단일 금속으로 이루어진 촉매에 비해 VOCs 전환율이 더 높았다. H2O-H2 처리는 Pt 입자의 분산에서 형태에 영향을 미쳤다. 본 연구에서 Pt에 소량의 Ru, Ir 첨가는 VOCs의 산화반응을 증진시켰고, γ-Al2O3 담체상에서 H2O-H2 처리는 VOCs의 산화반응을 증진시켰다. The volatile organic compounds(VOCs) have been recognized as major contributor to air pollution. The catalytic oxidation is one of the most important processes for VOCs destruction due to getting high efficiency at low temperature. In this study, monometallic Pt and bimetallic Pt-Ru, Pt-Ir were supported to γ-Al2O3. In order to distribute metals uniformly, H2O-H2 treatment method was used. Xylene, toluene and MEK were used as reactants. The monometallic or bimetallic catalysts were prepared by the excess wetness impregnation method and were characterized by XRD, XPS,and TEM analysis. In the VOCs oxidation, Pt-Ru, Pt-Ir bimetallic catalyst had multipoint active sites, so it improved the range of Pt metal state. Therefore, bimetallic catalysts were higher conversion of VOCs than monometallic ones. The effect of H2O-H2 treatment was uniform distribution of Pt particles. In this study, the use of small amount of Ru, Ir to Pt promoted oxidation conversion of VOCs. In addition to, H2O-H2 treatment promoted oxidation conversion of VOCs on the γ-Al2O3 support.