引用本文:
毕丽晓, 刘增花, 孔德生, 郁章玉, 冯媛媛. 炭载Pt-Ag双金属催化剂对甲醇氧化反应的电催化[J]. 应用化学,
2013, 30(1): 107-113.
doi:
DOI:10.3724/SP.J.1095.2013.20053
Citation: BI Lixiao, LIU Zenghua, KONG Desheng, YU Zhangyu, FENG Yuanyuan. Carbon-supported Pt-Ag Bimetallic Catalysts for Methanol Electro-Oxidation Reaction[J]. Chinese Journal of Applied Chemistry, 2013, 30(1): 107-113. doi: DOI:10.3724/SP.J.1095.2013.20053
Citation: BI Lixiao, LIU Zenghua, KONG Desheng, YU Zhangyu, FENG Yuanyuan. Carbon-supported Pt-Ag Bimetallic Catalysts for Methanol Electro-Oxidation Reaction[J]. Chinese Journal of Applied Chemistry, 2013, 30(1): 107-113. doi: DOI:10.3724/SP.J.1095.2013.20053
炭载Pt-Ag双金属催化剂对甲醇氧化反应的电催化
摘要:
以NaBH4为还原剂,将K2PtCl6和AgNO3前体进行共还原制备了一系列具有不同组成的碳载PtmAg/C合金催化剂(m为Pt/Ag原子比,m为0.05~1.0),在酸性介质中考察了该系列催化剂对甲醇氧化反应的电催化性能。与单组分Pt/C催化剂相比,系列PtmAg/C催化剂呈现出较高的催化氧化甲醇的活性与抗CO毒化能力,而且该催化剂的性能与其组成密切相关。随m值增加,PtmAg/C催化剂对甲醇氧化反应的质量比催化活性(MSA)、本征催化活性(IA)与稳定性均逐步增加,当m=0.5时催化活性达到最高,其MSA和IA分别是Pt/C催化剂的5.1和4.8倍。
English
Carbon-supported Pt-Ag Bimetallic Catalysts for Methanol Electro-Oxidation Reaction
Abstract:
A series of alloyed PtmAg/C catalysts(m:Pt/Ag atomic ratio,0.05~1.0) were prepared by the co-reduction of K2PtCl6 and AgNO3 precursors with NaBH4 as the reducing agent.The electrocatalytic performance of the PtmAg/C catalysts for the methanol electro-oxidation was investigated.These PtmAg/C catalysts after electrochemical dealloying treatment in H2SO4 show enhanced catalytic activities for the methanol electro-oxidation and the CO tolerance as compared with the pure Pt/C catalyst,and the catalytic performance is strongly dependent on the catalyst composition(m).The mass-specific activity(MSA),intrinsic activity(IA) and stability of PtmAg/C catalysts increase with increasing m up to 0.5.The MSA and IA of Pt0.5Ag/C catalyst is ca.5.1 and 4.8 times of that of Pt in Pt/C catalyst,respectively.
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Key words:
- platinum
- / silver
- / dealloy
- / acidic electrolyte
- / methanol electro-oxidation
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