Although the Co-Ni-M (M = O, S, P and Se) materials exhibit excellent oxygen evolution or hydrogen evolution properties, they still display inferior overall water splitting activity, thus hindering their large-scale practical industrial application. Constructing a heterogeneous Co-Ni-M/oxide interface (M = O, S, P and Se) would be a promising approach to enhance the water splitting performance of Co-Ni-M (M = O, S, P and Se) samples in an alkaline medium, however, that it remains unexplored and challenged. In this paper, the Co-Ni-M@CeO2/NF (M = O, S, P and Se) electrodes was firstly in situ grown on three-dimensional (3D) conductive nickel foams (NF) support through selective sulfuration, phosphorization and selenylation of the Co-Ni-O@CeO2 under a N2 atmosphere. The Co-Ni-S@CeO2/NF display superior oxygen evolution reaction performance with requiring overpotential of 170 mV@20 mA cm−2 and Co-Ni-P@CeO2/NF display excellent hydrogen evolution reaction activity with requiring an overpotential 120 mV@10 mA cm−2 in an alkaline medium. What’s more, an electrode pairing of Co-Ni-S@CeO2/NF//Co-Ni-P@CeO2/NF was assembled for overall water splitting using the Co-Ni-S@CeO2/NF material as anodic catalyst together with the Co-Ni-P@CeO2/NF material as efficient cathodic catalyst. The assembled alkaline electrolyzer required a relatively small cell voltage of 1.60 V to obtain a current density of 10 mA cm−2, which is one of the best electrocatalytic activities reported so far. The Co-Ni-S@CeO2/NF//Co-Ni-P@CeO2/NF also displayed relatively satisfactory durability and the current density had no significant attenuation during a 10 h electrocatalytic measurement in 1.0 M KOH. This selective sulfuration, phosphorization and selenylation strategy is effective in developing the M hybrid /oxide interface (M = O, S, P and Se) for overall water splitting applications.

中文翻译：

---

选择性硫化、磷酸化和硒化：实现 Co-Ni-M@CeO2/NF（M = O、S、P 和 Se）界面工程的通用策略，用于高效分解水电催化


尽管 Co-Ni-M（M = O、S、P 和 Se）材料表现出优异的析氧或析氢性能，但它们仍然表现出较差的整体分解水活性，从而阻碍了其大规模的实际工业应用。构建非均相 Co-Ni-M/氧化物界面（M = O、S、P 和 Se）将是提高 Co-Ni-M（M = O、S、P 和 Se）样品在碱性介质中的分解水性能的一种很有前途的方法，然而，它仍未得到探索和挑战。在本文中，首先在 N2 气氛下，通过对 Co-Ni-M@CeO2 O@CeO2 进行选择性硫化、磷酸化和硒化，在三维 （3D） 导电泡沫镍 （NF） 载体上原位生长 Co-Ni-/NF （M = O， S， P 和 Se） 电极。Co-Ni-S@CeO2/NF 表现出优异的析氧反应性能，需要 170 mV@20 mA cm-2 的过电位，而 Co-Ni-P@CeO2/NF 表现出优异的析氢反应活性，在碱性介质中需要 120 mV@10 mA cm-2 的过电位。此外，使用 Co-Ni-S@CeO2/NF 材料作为阳极催化剂，Co-Ni-P@CeO2/NF 材料作为高效阴极催化剂，组装了 Co-Ni-S@CeO2/NF//Co-Ni-P@CeO2/NF 的电极对，用于整体分解水。组装的碱性电解槽需要相对较小的电池电压 1.60 V 才能获得 10 mA cm-2 的电流密度，这是迄今为止报道的最佳电催化活性之一。Co-Ni-S@CeO2/NF//Co-Ni-P@CeO2/NF 也表现出相对令人满意的耐久性，在 1.0 M KOH 的 10 h 电催化测量过程中，电流密度没有明显的衰减。 这种选择性硫化、磷酸化和硒化策略可有效开发用于整体水分解应用的 M 杂化/氧化物界面（M = O、S、P 和 Se）。