Abstract

Porous metal phosphide cubes with exposed vertices and edges containing abundant catalytically active sites are promising electrocatalysts. Herein, by integrating the advantages of the phosphorus-rich cobalt phosphides and bimetallic oxides to form hybrid architectures, we prepared CoP₃/CoSnO₂ via phosphating CoSn(OH)₆ nanocubes, which has unique porous nanocubic structure. The optimized CoP₃/CoSnO₂ porous nanaocubes showed excellent electrocatalytic activity for OER/ORR. What’s more, the electrochemical performances of CoP₃/CoSnO₂ porous nanaocubes as air cathode catalyst for zinc air batteries were better than that of commercial RuO₂ and 20 wt% Pt/C with a mass ratio of 1:1 as the air cathode catalyst. This work offers a new strategy to fabricate metal phosphide with porous nanocubic structures.

中文翻译：

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高性能Zn-空气电池的多孔磷富CoP 3 / CoSnO 2杂化纳米立方体

摘要

具有暴露的顶点和边缘的多孔金属磷化物立方体具有丰富的催化活性位点是有前途的电催化剂。在这里，通过整合富含磷的钴磷化物和双金属氧化物的优势以形成混合结构，我们通过磷化具有独特的多孔纳米立方结构的CoSn（OH）₆纳米立方来制备了CoP ₃ / CoSnO ₂。优化的CoP ₃ / CoSnO ₂多孔纳米球对OER / ORR具有优异的电催化活性。而且，作为锌空气电池的空气阴极催化剂，CoP ₃ / CoSnO ₂多孔纳碳管的电化学性能优于商业化RuO _2。空气阴极催化剂的质量比为1∶1、20重量％的Pt / C。这项工作提供了一种新的策略来制备具有多孔纳米立方结构的金属磷化物。