亚氧化物
材料科学
催化作用
电催化剂
电化学
过渡金属
亚稳态
电池(电)
化学工程
锆
阴极
碳纤维
氧还原反应
纳米技术
氧化物
电极
化学
物理化学
冶金
功率(物理)
有机化学
生物化学
物理
量子力学
复合材料
复合数
工程类
作者
Huashuai Hu,Zhihang Xu,Zhaorui Zhang,Xiaohui Yan,Ye Zhu,J. Paul Attfield,Minghui Yang
标识
DOI:10.1002/anie.202404374
摘要
Strategies for discovery of high‐performance electrocatalysts are important to advance clean energy technologies. Metastable phases such as low temperature or interfacial structures that are difficult to access in bulk may offer such catalytically active surfaces. We report here that the suboxide Zr3O, which is formed at Zr‐ZrO2 interfaces but does not appear in the experimental Zr‐O phase diagram exhibits outstanding oxygen reduction reaction (ORR) performance surpassing that of benchmark Pt/C and most transition metal‐based catalysts. Addition of Fe3C nanoparticles to give a Zr‐Zr3O‐Fe3C/NC catalyst (NC = nitrogen‐doped carbon) gives a half‐wave potential (E1/2) of 0.914 V, outperforming Pt/C and showing only a 3 mV decrease after 20,000 electrochemical cycles. A zinc‐air battery (ZAB) using this cathode material has a high power density of 241.1 mW cm‐2 and remains stable for over 50 days of continuous cycling, demonstrating potential for practical applications. Zr3O demonstrates that interfacial or other phases that are difficult to stabilize may offer new directions for the discovery of high‐performance electrocatalysts.
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