Enhancing glycerol electrooxidation from synergistic interactions of platinum and transition metal carbides
Enhancing glycerol electrooxidation from synergistic interactions of platinum and transition metal carbides
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DOI：
10.1016/j.apcatb.2022.121648
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发表时间：
2022-11-05
影响因子：
22.1
通讯作者：
Chen, Jingguang G.
中科院分区：
文献类型：
--
作者：
Mou, Hansen;Chang, Qiaowan;Chen, Jingguang G.
为了有效地利用甘油作为电化学燃料电池的燃料，有必要优化催化剂以有效地裂解C-C键并完全氧化反应中间体以实现最大效率。目前的工作表明，铂（Pt）与过渡金属碳化物（TMC）衬底，如碳化钨（WC）和碳化钽（TaC）的协同相互作用，满足这些标准。结果表明，TMC负载的Pt催化剂对甘油完全氧化的活性和选择性均高于10wt%Pt/C催化剂。原位FTIR分析表明，5重量%的Pt/WC是最有效的催化剂，其中测试的完全甘油氧化在0.9 V相对于RHE。原位X射线吸收精细结构表征和密度泛函理论计算提供了额外的洞察力的协同作用，甘油氧化Pt/TMC催化剂。
To effectively utilize glycerol as a fuel for electrochemical fuel cells, it is necessary to optimize catalysts for effective C-C bond cleavage and complete oxidation of reaction intermediates to achieve maximum efficiency. The current work showed that the synergistic interactions of platinum (Pt) with transition metal carbide (TMC) substrates, such as tungsten carbide (WC) and tantalum carbide (TaC), fulfilled these criteria. The TMCsupported Pt catalysts showed higher activity and selectivity for complete glycerol oxidation than commercial 10 wt% Pt/C. In-situ FTIR analysis revealed that 5 wt% Pt/WC was the most effective catalyst among those tested for complete glycerol oxidation at 0.9 V vs RHE. In-situ X-ray absorption fine structure characterization and density functional theory calculations provided additional insight into the synergistic interactions for glycerol oxidation over Pt/TMC catalysts.