文献类型：期刊文献

英文题名：Facile synthesis of single-atom electrocatalysts with tailored carbon architectures via a polyelectrolyte brush-templated-growth approach

作者：Fu, Zhinan[1,2,3];Wang, Lizhen[1,2];Zhang, Weijun[1,2];Tang, Xuan[1,2];Xia, Wenxin[1,2];Li, Jinxia[1,2];Wang, Kuanwen[4];Zhou, Lihui[1,2];Guo, Xuhong[3];Dai, Sheng[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Natl Cent Univ, Inst Mat Sci & Engn, Taoyuan 320, Taiwan

年份：2023

卷号：11

期号：33

起止页码：17533

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20233514656005);WOS:【SCI-EXPANDED(收录号:WOS:001047521300001)】；

基金：This work was financially supported by the Science and Technology Commission of Shanghai Municipality (22ZR1415700), Shanghai Rising-star Program (20QA1402400), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and the Fundamental Research Funds for the Central Universities. Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center at East China University of Science and Technology.

语种：英文

外文关键词：Atoms - Benchmarking - Electrocatalysis - Electrocatalysts - Electrolytic reduction - Iron - Mass transfer - Morphology - Polyelectrolytes

摘要：ZIF-8-derived single atom catalysts (SACs) have been widely reported and show prospects for various electrocatalytic reactions. In addition to the coordination environments of the single atoms, the geometric shape and morphology of ZIF-8 also affect the catalytic performances, which is somewhat unnoticed and not studied thoroughly at the current stage. Herein, we report a polyelectrolyte brush-templated-growth approach to synthesize ZIF-8-derived SACs with different hollow carbon nanoarchitectures. An anionic spherical poly(acrylic acid) brush (PAA-SPB) with a highly negatively charged polyelectrolyte brush layer is rationally designed and used to grow ZIF-8 nanocrystals in situ via a spatial confinement strategy. Such an approach is verified for the synthesis of Fe, Co, Cu, and Pd single-atom catalysts, respectively. In particular, the as-synthesized Fe single-atom catalysts are used to highlight the advantages of this synthetic approach, realizing superior oxygen reduction reaction (ORR) performance and outperforming the benchmark Pt/C. The morphology and structure of a ZIF-8-derived carbon matrix based on PAA-SPB and its effect on the ORR performance are studied intensively. It is revealed that more Fe single atom active sites are exposed, while the mass transfer in the electrochemical process is promoted via the elaborate tuning of carbon architectures. This work provides a new synthetic strategy that is facile, controllable, and general for achieving the delicate design of the high-performance single-atom catalysts from the aspect of the supports.