To rationally design efficient and cost-effective electrocatalysts, a simple but efficient strategy has been developed to directly anchor prussian blue analogue (PBA) nanocubes on cobalt hydroxide nanoplates (PBA@Co(OH)2 ) via the in-situ interfacial precipitation process. Subsequently, the thermal treatment in the presence of sodium hydrogen phosphite enabled the successful transition into metal phosphides with the hierarchical cube-on-plate structure. When used as electrocatalytsts, the obtained bimetal phosphides exhibited good bifunctional electrocatalytic activities for hydrogen and oxygen evolution reactions with good long-term stability. Thus, an enhanced performance for overall water splitting can be achieved, which could be ascribed to the hierarchical structure and favorable composition of as-prepared bimetal phosphide for rapid electron and mass transfer. The present study demonstrates a favorable approach to modulate the composition and structure of metal phosphide for enhancing the electrocatalytic ability toward water splitting.

中文翻译：

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制备用作双官能团整体水分解双功能电催化剂的分层板载金属磷酸盐。

为了合理地设计高效且具有成本效益的电催化剂，已经开发了一种简单而有效的策略，即通过原位界面沉淀过程将普鲁士蓝类似物（PBA）纳米立方直接锚固在氢氧化钴纳米板上（PBA @ Co（OH）2）。随后，在亚磷酸氢钠存在下进行热处理能够成功地转变为具有分层的立方层板结构的金属磷化物。当用作电催化剂时，所获得的双金属磷化物对氢和氧的放出反应表现出良好的双功能电催化活性，并具有良好的长期稳定性。因此，可以实现整体水分解的增强性能，这可以归因于所制备的双金属磷化物的分级结构和有利的组成，以实现快速的电子和质量传递。本研究证明了调节金属磷化物的组成和结构以增强对水分解的电催化能力的有利方法。