Enhanced oxygen reduction with single-atomic-site iron catalysts for a zinc-air battery and hydrogen-air fuel cell
Yuanjun Chen,Shufang Ji,Shu Zhao,Wenxing Chen,Juncai Dong,Weng-Chon Cheong,Rongan Shen,Xiaodong Wen,Lirong Zheng,Alexandre I. Rykov,Shichang Cai,Haolin Tang,Zhongbin Zhuang,Chen Chen,Qing Peng,Dingsheng Wang,Yadong Li +16 more
TL;DR: Benefiting from structure functionalities and electronic control of a single-atom iron active center, the catalyst shows a remarkable performance with enhanced kinetics and activity for oxygen reduction in both alkaline and acid media and shows promise for substitution of expensive platinum to drive the cathodic oxygen reduction reaction in zinc-air batteries and hydrogen-air fuel cells.
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Abstract: Efficient, durable and inexpensive electrocatalysts that accelerate sluggish oxygen reduction reaction kinetics and achieve high-performance are highly desirable. Here we develop a strategy to fabricate a catalyst comprised of single iron atomic sites supported on a nitrogen, phosphorus and sulfur co-doped hollow carbon polyhedron from a metal-organic framework@polymer composite. The polymer-based coating facilitates the construction of a hollow structure via the Kirkendall effect and electronic modulation of an active metal center by long-range interaction with sulfur and phosphorus. Benefiting from structure functionalities and electronic control of a single-atom iron active center, the catalyst shows a remarkable performance with enhanced kinetics and activity for oxygen reduction in both alkaline and acid media. Moreover, the catalyst shows promise for substitution of expensive platinum to drive the cathodic oxygen reduction reaction in zinc-air batteries and hydrogen-air fuel cells.
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Citations
FeNi alloys encapsulated in N-doped CNTs-tangled porous carbon fibers as highly efficient and durable bifunctional oxygen electrocatalyst for rechargeable zinc-air battery
Zhe Wang,Jiaming Ang,Jian Liu,Xiu Yun Daphne Ma,Junhua Kong,Youfang Zhang,Tao Yan,Xuehong Lu +7 more
TL;DR: In this article, a promising electrocatalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were reported, which are composed of nanostructured FeNi alloy nanoparticles inlaid on N-doped carbon nanotubes (CNTs)-tangled porous carbon fibers (FeNi/N-CPCF).
272
Structural Regulation with Atomic-Level Precision: From Single-Atomic Site to Diatomic and Atomic Interface Catalysis
Yuan Pan,Yuan Pan,Chao Zhang,Zhi Liu,Chen Chen,Yadong Li +5 more
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TL;DR: In this paper, the authors compare single-atomic-site catalysts with clusters/nanoparticles in terms of their catalytic behaviors, and systematically interpret the impacts of the microscopic structures of SASCs on catalytic performances.
268
Altering Ligand Fields in Single-Atom Sites through Second-Shell Anion Modulation Boosts the Oxygen Reduction Reaction.
TL;DR: In this article , an S-anion-coordinated single-atom Ru-N-C was used as a model system and the S anions were identified to bond with N atoms in the second coordination shell of Ru centers, which allowed the electronic configuration of central Ru sites.
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Design of Local Atomic Environments in Single-Atom Electrocatalysts for Renewable Energy Conversions.
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TL;DR: The authors first identify fundamental hurdles in electrochemical conversions and highlight the relevance of SAECs, then critically examine the role of the local atomic structures, encompassing the first and second coordination spheres of the isolated metal atoms, on the design of high-performance SAecs.
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Lei Jiao,Jiabin Wu,Hong Zhong,Yu Zhang,Weiqing Xu,Yu Wu,Yifeng Chen,Hongye Yan,Qinghua Zhang,Wenling Gu,Lin Gu,Scott P. Beckman,Liang Huang,Chengzhou Zhu +13 more
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