Needle grass-like cobalt hydrogen phosphate on Ni foam as an effective and stable electrocatalyst for the oxygen evolution reaction.

Exploring efficient non-precious metal electrocatalysts for the oxygen evolution reaction (OER) is a challenging task in sustainable energy systems. Herein, facile and novel three dimensional (3D) needle grass-like CoHPO4·H2O on Ni foam (CoHPO/NF) has been prepared as an effective and robust OER electrocatalyst for the first time. The unique 3D topological structure of CoHPO exposes more electrocatalytic active sites and facilitates mass transport. The coordinated HPO42- anions work as OH- traps to synergistically enhance the process of the OER. Because of these advantages, it exhibits an extraordinary OER performance with a low overpotential of only 350 mV at 50 mA cm-2. Notably, it also exhibits excellent long-term stability. According to the theoretical calculations, the electron structure of the Co was significantly influenced by the coupled HPO42- species, which leads to superior activity for the OER. All the findings imply that CoHPO/NF is a promising material to substitute for noble metals in overall water splitting.

[1]  Huan Wang,et al.  High-performance hierarchical ultrathin sheet-based CoOOH hollow nanospheres with rich oxygen vacancies for the oxygen evolution reaction , 2019, Journal of Materials Chemistry A.

[2]  B. Rieger,et al.  Unprecedented High Oxygen Evolution Activity of Electrocatalysts Derived from Surface-Mounted Metal-Organic Frameworks. , 2019, Journal of the American Chemical Society.

[3]  H. Yoshida,et al.  Platinum Cocatalyst Loaded on Calcium Titanate Photocatalyst for Water Splitting in a Flow of Water Vapor. , 2019, ChemSusChem.

[4]  Huifeng Li,et al.  3D Porous Amorphous γ-CrOOH on Ni Foam as Bifunctional Electrocatalyst for Overall Water Splitting. , 2019, Inorganic chemistry.

[5]  Huifeng Li,et al.  Engineering borate modified NiFe layer double hydroxide nanoarrays as "hydroxyl ions hungry" electrocatalysts for enhanced oxygen evolution. , 2019, Chemical communications.

[6]  Xiaodong Chen,et al.  Multi-Level Architecture Optimization of MOF-Templated Co-Based Nanoparticles Embedded in Hollow N-Doped Carbon Polyhedra for Efficient OER and ORR , 2018, ACS Catalysis.

[7]  A. Chakraborty,et al.  Predicting accurate cathode properties of layered oxide materials using the SCAN meta-GGA density functional , 2018, npj Computational Materials.

[8]  Huifeng Li,et al.  Significant enhancement of the performance of hydrogen evolution reaction through shape-controlled synthesis of hierarchical dendrite-like platinum , 2018 .

[9]  Yujie Sun,et al.  Innovative Strategies for Electrocatalytic Water Splitting. , 2018, Accounts of chemical research.

[10]  Abdullah M. Asiri,et al.  Selective phosphidation: an effective strategy toward CoP/CeO2 interface engineering for superior alkaline hydrogen evolution electrocatalysis , 2018 .

[11]  Qiang Zhang,et al.  Bifunctional Transition Metal Hydroxysulfides: Room‐Temperature Sulfurization and Their Applications in Zn–Air Batteries , 2017, Advanced materials.

[12]  Yibing Li,et al.  Enhancing Water Oxidation Catalysis on a Synergistic Phosphorylated NiFe Hydroxide by Adjusting Catalyst Wettability , 2017 .

[13]  Abdullah M. Asiri,et al.  High-Performance Electrolytic Oxygen Evolution in Neutral Media Catalyzed by a Cobalt Phosphate Nanoarray. , 2017, Angewandte Chemie.

[14]  Abdullah M. Asiri,et al.  Energy-Saving Electrolytic Hydrogen Generation: Ni2 P Nanoarray as a High-Performance Non-Noble-Metal Electrocatalyst. , 2017, Angewandte Chemie.

[15]  Bin Zhao,et al.  A review on noble-metal-free bifunctional heterogeneous catalysts for overall electrochemical water splitting , 2016 .

[16]  Liejin Guo,et al.  Co3(OH)2(HPO4)2 as a novel photocatalyst for O2 evolution under visible-light irradiation , 2016 .

[17]  Xiaoxin Li,et al.  In situ fabrication of Ni-Co (oxy)hydroxide nanowire-supported nanoflake arrays and their application in supercapacitors. , 2016, Nanoscale.

[18]  Lingyun Chen,et al.  Engineering of Two-dimensional Cobalt-Glycine Complex Thin Sheets of Vertically Aligned Nanosheet Basic Building Blocks for High Performance Supercapacitor Electrode Materials , 2016 .

[19]  K. Nagai,et al.  A water splitting system using an organo-photocathode and titanium dioxide photoanode capable of bias-free H2 and O2 evolution. , 2016, Chemical communications.

[20]  A. Xu,et al.  Cobalt phosphate nanoparticles decorated with nitrogen-doped carbon layers as highly active and stable electrocatalysts for the oxygen evolution reaction , 2016 .

[21]  Chengzhou Zhu,et al.  Facilely Tuning Porous NiCo2 O4 Nanosheets with Metal Valence-State Alteration and Abundant Oxygen Vacancies as Robust Electrocatalysts Towards Water Splitting. , 2016, Chemistry.

[22]  Zhaolin Liu,et al.  A Flexible Electrode Based on Iron Phosphide Nanotubes for Overall Water Splitting. , 2015, Chemistry.

[23]  M. Symes,et al.  Efficient Electrocatalytic Water Oxidation at Neutral and High pH by Adventitious Nickel at Nanomolar Concentrations. , 2015, Journal of the American Chemical Society.

[24]  Adrienn Ruzsinszky,et al.  Strongly Constrained and Appropriately Normed Semilocal Density Functional. , 2015, Physical review letters.

[25]  H. Ortiz-Oliveros,et al.  Synthesis of α-Ti(HPO4)2·H2O and sorption of Eu (III) , 2014 .

[26]  Y. Shao-horn,et al.  Synthesis and Activities of Rutile IrO2 and RuO2 Nanoparticles for Oxygen Evolution in Acid and Alkaline Solutions. , 2012, The journal of physical chemistry letters.

[27]  Changwen Hu,et al.  Hierarchical Three-Dimensional Cobalt Phosphate Microarchitectures : Large-Scale Solvothermal Synthesis, Characterization, and Magnetic and Microwave Absorption Properties , 2008 .

[28]  Daniel G. Nocera,et al.  In Situ Formation of an Oxygen-Evolving Catalyst in Neutral Water Containing Phosphate and Co2+ , 2008, Science.

[29]  G. Scuseria,et al.  Climbing the density functional ladder: nonempirical meta-generalized gradient approximation designed for molecules and solids. , 2003, Physical review letters.

[30]  G. Kresse,et al.  Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set , 1996 .

[31]  M. Antonietti,et al.  A metal-free polymeric photocatalyst for hydrogen production from water under visible light. , 2009, Nature materials.