Herein, we report the linearly distributed NiCo-NiCoP nanoparticles embedded into P-doped carbon nanotubes (NiCo-NiCoP@PCT) which are synthesized via the chelation of phytic acid (PA) on the surface of Ni-Co-precursor nanowires and the subsequent thermal reduction. The PA is used not only as chelating agent to form Ni-Co@PA coating but also as solid phosphorus source to safely synthesize heterostructured NiCo-NiCoP. The as-prepared NiCo-NiCoP@PCT used as bifunctional electrodes exhibit superiorly electrocatalytic performance toward both hydrogen evolution reaction (HER) with a low overpotential of 135 mV at 10 mA cm⁻² and anodic oxidation reaction of formaldehyde (FOR) with an ultra-low overpotential of 1.18 V to acquire 10 mA cm⁻². Besides, when a two-electrode cell is constructed by using NiCo-NiCoP@PCT as anode and cathode, the current density of formaldehyde-based water electrolysis (50 mA cm⁻²) is 6.25 times bigger than that of conventional water splitting (8 mA cm⁻²) at the same voltage of 1.76 V. In addition, methanol (CH₃OH) is produced simultaneously by hydrogenation reduction reaction of formaldehyde at the cathode, which realized the upgraded conversion of HCHO to small molecular fuel by electrocatalytic reduction. Therefore, it is demonstrated that the two-electrode electrolyzer not only realize the oxidative degradation and upgraded conversion of formaldehyde-based wastewater, but also reduce the energy consumption of water splitting for hydrogen generation. This work presents a new idea of controllable preparation for multifunctional phosphide electrodes and a novel construction of electrochemical cell to realize efficient hydrogen energy preparation and environmental management.

在此，我们报告了嵌入 P 掺杂碳纳米管 (NiCo-NiCoP@PCT) 中的线性分布的 NiCo-NiCoP 纳米粒子，该纳米粒子是通过在 Ni-Co 前体纳米线表面螯合植酸 (PA)合成的，随后热还原。PA 不仅用作螯合剂以形成 Ni-Co@PA 涂层，而且用作固体磷源以安全合成异质结构的 NiCo-NiCoP。所制备的 NiCo-NiCoP@PCT 用作双功能电极，对 10 mA cm ^{-2 下}具有 135 mV 低过电位的析氢反应 (HER)和甲醛的阳极氧化反应 (FOR)均表现出优异的电催化性能。 - 1.18 V 的低过电位以获取 10 mA cm ^-2. 此外，当使用 NiCo-NiCoP@PCT 作为阳极和阴极构建双电极电池时，甲醛基水电解的电流密度 (50 mA cm ^-2 ) 是传统水分解的 6.25 倍 (8 mA cm ^-2 ) 在 1.76 V 的相同电压下。此外，甲醇 (CH ₃OH)在阴极通过加氢还原反应同时产生，实现了HCHO通过电催化还原升级为小分子燃料。因此，证明了双电极电解槽不仅实现了甲醛基废水的氧化降解和升级转化，而且降低了分解水制氢的能耗。这项工作提出了多功能磷化物电极可控制备的新思路和电化学电池的新型结构，以实现高效的氢能制备和环境管理。