ORCID Profile
0000-0001-5902-3037
Current Organisation
Tsinghua University
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Publisher: American Chemical Society (ACS)
Date: 05-12-2019
DOI: 10.1021/JACS.9B09352
Abstract: Designing atomically dispersed metal catalysts for oxygen reduction reaction (ORR) is a promising approach to achieve efficient energy conversion. Herein, we develop a template-assisted method to synthesize a series of single metal atoms anchored on porous N,S-codoped carbon (NSC) matrix as highly efficient ORR catalysts to investigate the correlation between the structure and their catalytic performance. The structure analysis indicates that an identical synthesis method results in distinguished structural differences between Fe-centered single-atom catalyst (Fe-SAs/NSC) and Co-centered/Ni-centered single-atom catalysts (Co-SAs/NSC and Ni-SAs/NSC) because of the different trends of each metal ion in forming a complex with the N,S-containing precursor during the initial synthesis process. The Fe-SAs/NSC mainly consists of a well-dispersed FeN
Publisher: American Chemical Society (ACS)
Date: 30-08-2018
DOI: 10.1021/JACS.8B06029
Abstract: Hydrogenation and hydrodeoxygenation are significant and distinct approaches for the conversion of biomass and biomass-derived oxygenated chemicals into high value-added chemicals and fuels. However, it remains a great challenge to synthesize catalysts that simultaneously possess excellent hydrogenation and hydrodeoxygenation performance. Herein, we report a catalyst made of isolated single-atom Ru supported on mesoporous graphitic carbon nitride (Ru
Publisher: Springer Science and Business Media LLC
Date: 12-12-2018
Publisher: American Chemical Society (ACS)
Date: 30-01-2019
DOI: 10.1021/JACS.8B13579
Abstract: A central topic in single-atom catalysis is building strong interactions between single atoms and the support for stabilization. Herein we report the preparation of stabilized single-atom catalysts via a simultaneous self-reduction stabilization process at room temperature using ultrathin two-dimensional Ti
Publisher: American Association for the Advancement of Science (AAAS)
Date: 14-08-2020
Abstract: Visible-light photocatalytic hydrogen is optimized using the synergistic effect of single atoms with their coordinating element.
Publisher: Wiley
Date: 25-02-2023
Abstract: Single‐atom catalysts (SACs) have attracted extensive interest to catalyze the oxygen reduction reaction (ORR) in fuel cells and metal–air batteries. However, the development of SACs with high selectivity and long‐term stability is a great challenge. In this work, carbon vacancy modified Fe–N–C SACs (Fe H –N–C) are practically designed and synthesized through microenvironment modulation, achieving high‐efficient utilization of active sites and optimization of electronic structures. The Fe H –N–C catalyst exhibits a half‐wave potential ( E 1/2 ) of 0.91 V and sufficient durability of 100 000 voltage cycles with 29 mV E 1/2 loss. Density functional theory (DFT) calculations confirm that the vacancies around metal–N 4 sites can reduce the adsorption free energy of OH*, and hinder the dissolution of metal center, significantly enhancing the ORR kinetics and stability. Accordingly, Fe H –N–C SACs presented a high‐power density and long‐term stability over 1200 h in rechargeable zinc–air batteries (ZABs). This work will not only guide for developing highly active and stable SACs through rational modulation of metal–N 4 sites, but also provide an insight into the optimization of the electronic structure to boost electrocatalytical performances.
Location: United States of America
Location: United States of America
No related grants have been discovered for Chen Chen.