Construction of interface-engineered coral-like nickel phosphide@cerium oxide hybrid nanoarrays to boost electrocatalytic hydrogen evolution performance in alkaline water/seawater electrolytes

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2023-09-27 DOI:10.1007/s42114-023-00750-0

Chaojie Lyu, Jiarun Cheng, Huichao Wang, Yuquan Yang, Kaili Wu, Peng Song, Woon-ming Lau, Jinlong Zheng, Xixi Zhu, Hui Ying Yang

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Abstract

Fabricating a functional heterogeneous interface to enhance catalytic performance is quite significant for developing high-efficiency electrocatalysts. Herein, a coral-like nickel phosphide@cerium oxide (Ni₂P@CeO₂) hybrid nanoarray on nickel foam was designed via selective-phosphorization of nickel hydroxide@cerium oxide (Ni(OH)₂@CeO₂). Benefiting from CeO₂ as the “electron pump,” it leads to electron transfer from Ni₂P to the CeO₂ side, and induces electron redistribution in the interface boundary, thereby optimizing the H* adsorption free energy in the hydrogen evolution reaction (HER) process. As hypothesized, the water molecules will preferentially adsorb on the CeO₂ side due to its better affinity for oxygen-containing species, and will readily break down into OH* and H* at a lower energy barrier. Subsequently, benefiting from the lower H* adsorption free energy of P sites, the generated H* will migrate to the Ni₂P side through the spillover process. Contributing to the synergistic effect of double-active sites, the Ni₂P@CeO₂/NF electrode exhibits brilliant catalytic performance for HER with 62 mV to attain 10 mA/cm² and exceptional durability over 100 h in alkaline solution at ~ 100 mA/cm². Meanwhile, attributing to the similar interface electron redistribution effect, the precursor Ni(OH)₂@CeO₂/NF likewise displays excellent oxygen evolution reaction (OER) electrocatalytic performance, which only requires 229 mV to arrive at 10 mA/cm², even better than benchmark ruthenium dioxide (RuO₂). Hence, the assembled Ni(OH)₂@CeO₂/NF||Ni₂P@CeO₂/NF system only needs 1.53 V to achieve 10 mA/cm² in alkaline solution. Moreover, the electrolyzer also presents brilliant electrocatalytic activity and stability in alkaline natural seawater electrolyte with higher reserves on earth.

Graphical Abstract

“Electrons pump” effect of CeO₂ ensures that interface-engineered Ni₂P@CeO₂ hybrid nanoarrays prepared via selective-phosphorization treatment present superior HER catalytic performance

Abstract Image

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界面工程珊瑚状镍的构建phosphide@cerium氧化物杂化纳米阵列在碱性水/海水电解质中提高电催化析氢性能

构建功能性非均相界面以提高催化性能对于开发高效电催化剂具有重要意义。这里，一个珊瑚状的镍phosphide@cerium氧化物(Ni2P@CeO2)通过对镍的选择性磷化，设计了泡沫镍上的混合纳米阵列hydroxide@cerium氧化物（Ni（OH）2@CeO2）。得益于CeO2作为“电子泵”，它导致电子从Ni2P转移到CeO2侧，并在界面边界诱导电子重新分布，从而优化析氢反应（HER）过程中的H*吸附自由能。正如假设的那样，由于水分子对含氧物质具有更好的亲和力，水分子将优先吸附在CeO2侧，并将在较低的能垒下容易分解为OH*和H*。随后，受益于P位点较低的H*吸附自由能，产生的H*将通过溢出过程迁移到Ni2P侧。有助于双活性位点的协同效应Ni2P@CeO2/NF电极对HER表现出出色的催化性能，62mV可达到10mA/cm2，在碱性溶液中100小时内具有优异的耐久性 ~ 同时，由于类似的界面电子再分配效应，前体Ni（OH）2@CeO2/NF同样表现出优异的析氧反应（OER）电催化性能，其仅需要229mV就可以达到10mA/cm2，甚至比基准二氧化钌（RuO2）更好。因此，组装的Ni（OH）2@CeO2/NF||Ni2P@CeO2/NF系统在碱性溶液中仅需1.53V即可达到10mA/cm2。此外，该电解槽在地球上储量较高的碱性天然海水电解质中也表现出优异的电催化活性和稳定性。图形摘要CeO2的“电子泵”效应确保界面工程Ni2P@CeO2选择性磷处理制备的杂化纳米阵列具有优异的HER催化性能

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.