电催化剂
催化作用
格式化
兴奋剂
铑
甲酸
无机化学
化学
材料科学
氧化态
碳纤维
电化学
电极
物理化学
复合数
有机化学
光电子学
复合材料
作者
Yu Xiong,Juncai Dong,Zheng-Qing Huang,Pingyu Xin,Wenxing Chen,Yu Wang,Zhi Li,Jianmin Zhao,Xing Wang,Zhongbin Zhuang,Jinyu Ye,Xing Wang,Rui Cao,Lin Gu,Shi‐Gang Sun,Lin Zhuang,Xiaoqing Chen,Hua Ye,Chen Chen,Qing Peng,Chun‐Ran Chang,Dingsheng Wang,Yadong Li
标识
DOI:10.1038/s41565-020-0665-x
摘要
To meet the requirements of potential applications, it is of great importance to explore new catalysts for formic acid oxidation that have both ultra-high mass activity and CO resistance. Here, we successfully synthesize atomically dispersed Rh on N-doped carbon (SA-Rh/CN) and discover that SA-Rh/CN exhibits promising electrocatalytic properties for formic acid oxidation. The mass activity shows 28- and 67-fold enhancements compared with state-of-the-art Pd/C and Pt/C, respectively, despite the low activity of Rh/C. Interestingly, SA-Rh/CN exhibits greatly enhanced tolerance to CO poisoning, and Rh atoms in SA-Rh/CN resist sintering after long-term testing, resulting in excellent catalytic stability. Density functional theory calculations suggest that the formate route is more favourable on SA-Rh/CN. According to calculations, the high barrier to produce CO, together with the relatively unfavourable binding with CO, contribute to its CO tolerance. Atomically dispersed Rh on N-doped carbon exhibits 28- and 67-fold enhancements compared with state-of-the-art Pd/C and Pt/C, despite the low activity of Rh/C. The Rh single atoms exhibit high tolerance to CO poisoning compared to Rh nanoparticles.
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