Ultra-small carbon-supported FeRu alloy as a superior electrocatalyst for hydrogen evolution reaction
Source abstract
Abstract
电化学水分解是将可再生能源产生的间歇性电能转化为高纯度氢气的一种极具前景的绿色能源技术. 目前, 高效制氢催化剂主要由贵金属及其化合物组成, 而贵金属的高成本及稀缺性, 限制了其在大规模工业化制氢中的应用. 因此, 探索低成本, 高电化学活性、 高稳定性的电解水制氢催化剂至关重要. 合金化材料以短程或长程有序结构存在, 具有增强的电化学性能. 因此, 本文采用两步法制备超小碳负载FeRu合金纳米电催化剂并将其应用于电催化析氢反应. Fe0.05Ru0.05/XC-72双功能电催化剂粒径为2.1 nm, 在碱性淡水和海水电解质中表现出优异的活性和耐久性. 10 mA cm−2时, 在1 mol L−1 KOH、1 mol L−1 KOH + 0.5 mol L−1 NaCl和1 mol L−1 KOH + 海水中分别表现出13、 15和18 mV的过电位. 在1 mol L−1 KOH介质和−0.07 V (相比于可逆氢电极)条件下, Fe0.05Ru0.05/XC-72的析氢质量活性高达({ m{A}},{ m{m}}{{ m{g}} - 1}_{{ m{noble}},,{ m{metal}}}). 在1 mol L−1 KOH中, Fe0.05Ru0.05/XC-72电催化剂具有24 h以上的长期析氢反应(HER)稳定性. 理论计算表明, 引入Fe形成的FeRu合金可以诱导电子效应, 使其对*H的吸附能力增强, 进一步提高了HER性能. 本工作对制备高电活性、 高稳定性的钌基电催化剂具有重要的启发意义.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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