School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2052, Australia.
Chemistry. 2020 Dec 1;26(67):15501-15504. doi: 10.1002/chem.202003561. Epub 2020 Oct 12.
Producing stable but active materials is one of the enduring challenges in electrocatalysis and other types of catalysis. Producing branched nanoparticles is one potential solution. Controlling the number of branches and branch size of faceted branched nanoparticles is one of the major synthetic challenges to achieve highly active and stable nanocatalysts. Herein, we use a cubic-core hexagonal-branch mechanism to synthesize branched Ru nanoparticles with control over the size and number of branches. This structural control is the key to achieving high exposure of active {10-11} facets and optimum number of Ru branches that enables improved catalytic activity for oxygen evolution reaction while maintaining high stability.
制备稳定但活性高的材料是电催化和其他类型催化中一个持久的挑战。制备支化纳米颗粒是一种潜在的解决方案。控制面心支化纳米颗粒的支化数量和支化大小是实现高活性和稳定纳米催化剂的主要合成挑战之一。在此，我们使用立方核-六方支化的机制，通过控制尺寸和支化数量来合成支化 Ru 纳米颗粒。这种结构控制是实现高暴露{10-11}面和最佳 Ru 支化数的关键，从而提高了析氧反应的催化活性，同时保持了高稳定性。
