电催化剂
Boosting(机器学习)
氧还原反应
二聚体
氧还原
材料科学
拉伤
化学
还原(数学)
氧气
化学工程
电化学
计算机科学
物理化学
有机化学
工程类
电极
医学
几何学
数学
机器学习
内科学
作者
Xiaozhang Yao,Zhongxin Song,Yan Xue,Yi Guan,Natalie Hamada,Jingyan Zhang,Ziwei Huo,Lei Zhang,Chandra Veer Singh,Xueliang Sun
标识
DOI:10.1002/anie.202318872
摘要
Abstract Alloying Pt catalysts with transition metal elements is an effective pathway to enhance the performance of oxygen reduction reaction (ORR), but often accompanied with severe metal dissolution issue, resulting in poor stability of alloy catalysts. Here, instead of forming traditional alloy structure, we modify Pt surface with a novel Ni−W dimer structure by the atomic layer deposition (ALD) technique. The obtained NiW@PtC catalyst exhibits superior ORR performance both in liquid half‐cell and practical fuel cell compared with initial Pt/C. It is discovered that strong synergistic Ni−W dimer structure arising from short atomic distance induced a stable compressive strain on the Pt surface, thus boosting Pt catalytic performance. This surface modification by synergistic dimer sites offers an effective strategy in tailoring Pt with excellent activity and stability, which provides a significant perspective in boosting the performance of commercial Pt catalyst modified with polymetallic atom sites.
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