Bai Yixuan, Fu Peixue, Gan Yuan, Cheng Qin, Wang Jiacheng, Guo Xingmei, Xiong Weiwei, Cheng Xiaofang, Zheng Fenfen, Zhang Junhao
School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology Zhenjiang, Jiangsu 212003, PR China; School of Material & Energy, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, PR China.
School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology Zhenjiang, Jiangsu 212003, PR China.
J Colloid Interface Sci. 2024 Sep 15;670:364-372. doi: 10.1016/j.jcis.2024.05.115. Epub 2024 May 16.
Improving the conductivity of the electrocatalyst itself is essential for enhancing its performance. In this work, N, S-rich 6-thioguanine (TG) is selected as the ligand to synthesize a Fe, Ni bimetallic porous coordination polymer (PCP), which is then derived to fabricate N,S codoped carbon (NSC)-coated (Fe,Ni)S/NiS bridged nanowires. The (Fe,Ni)S/NiS@NSC bridged nanowires obtained through bimetallic synergistic catalysis and self-sulfurization processes not only introduced additional electrocatalytic active sites but also significantly enhance the overall conductivity of the catalyst due to the interconnected nanowire structure. The resulting (Fe,Ni)S/NiS@NSC demonstrates remarkable oxygen evolution reaction (OER) performance, exhibiting an overpotential as low as 252 mV at a current density of 10 mA cm. This work proposes a novel strategy for enhancing the overall conductivity of catalysts by growing bridged nanowires, providing valuable insights and inspiration for the design and preparation of advanced transition metal sulfide electrocatalysts.
提高电催化剂本身的导电性对于提升其性能至关重要。在这项工作中，选择富含氮、硫的6-硫代鸟嘌呤（TG）作为配体来合成铁、镍双金属多孔配位聚合物（PCP），然后将其衍生制备出氮、硫共掺杂碳（NSC）包覆的（Fe,Ni）S/NiS桥接纳米线。通过双金属协同催化和自硫化过程获得的（Fe,Ni）S/NiS@NSC桥接纳米线不仅引入了额外的电催化活性位点，而且由于相互连接的纳米线结构，还显著提高了催化剂的整体导电性。所得的（Fe,Ni）S/NiS@NSC表现出卓越的析氧反应（OER）性能，在电流密度为10 mA cm时过电位低至252 mV。这项工作提出了一种通过生长桥接纳米线来提高催化剂整体导电性的新策略，为先进过渡金属硫化物电催化剂的设计和制备提供了有价值的见解和灵感。
