Comparison of the effects of cation and phosphorus doping in cobalt-based spinel oxides towards the oxygen evolution reaction
- 21 January 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in CrystEngComm
- Vol. 23 (8), 1849-1858
- https://doi.org/10.1039/d0ce01771j
Abstract
The sluggish kinetics of the oxygen evolution reaction (OER) has become a hindrance for the development of clean and sustainable energy technology and calls for highly efficient electrocatalysts. Recently, heteroatom doping has exhibited good prospects to boost the electrocatalytic performance of materials. Herein, we selected the typical MCo2O4 (M = transition metal)-type spinel oxides to test the doping effects aroused by metal cations and non-metal phosphorus (P) towards the OER in alkaline media. Not surprisingly, both cation and P dopants improved the OER activity. Additionally, P doping gave a further decrease of overpotential (reduced 34–194 mV) and Tafel slope (reduced 9.59–207.55 mV dec−1) compared to the oxide counterparts. Specifically, P-doped (Zn0.33Ni0.33Mn0.33)Co2O4 showed the best OER performance with the lowest overpotential of 0.349 V at 10 mA cm−2 and Tafel slope of 69.68 mV dec−1 and good stability after 2000 cycles of cyclic voltammetry. Redox pairs, oxygen vacancies, crystallinity and electrochemical active surface area were greatly modulated by heteroatom doping and together influenced the OER performance. This work confirms the synergistic effect of both metal and non-metal doping and the larger contribution of P dopants towards the OER, which gives a hint to develop superior electrocatalysts.Keywords
Funding Information
- National Natural Science Foundation of China (31700827, 81870810)
- National Key Research and Development Program of China (2017YFA0700104)
This publication has 55 references indexed in Scilit:
- Selective structure transformation for NiFe/NiFe2O4 embedded porous nitrogen-doped carbon nanosphere with improved oxygen evolution reaction activityChemical Engineering Journal, 2020
- Interface engineering of oxygen-vacancy-rich CoP/CeO2 heterostructure boosts oxygen evolution reactionChemical Engineering Journal, 2020
- Synthesis of rod-type Co2.4Mn0.6O4 via oxalate precipitation for water splitting catalystsApplied Surface Science, 2020
- CeO2-Induced Interfacial Co2+ Octahedral Sites and Oxygen Vacancies for Water OxidationACS Catalysis, 2019
- The application of transition metal cobaltites in electrochemistryEnergy Storage Materials, 2019
- Synthesis and ORR electrocatalytic activity of mixed Mn–Co oxides derived from divalent metal-based MIL-53 analoguesDalton Transactions, 2017
- Sulfur Incorporated CoFe2O4/Multiwalled Carbon Nanotubes toward Enhanced Oxygen Evolution ReactionElectrochimica Acta, 2017
- Hierarchical NiCo2O4 Hollow Microcuboids as Bifunctional Electrocatalysts for Overall Water‐SplittingAngewandte Chemie, 2016
- Rational design and synthesis of NixCo3−xO4 nanoparticles derived from multivariate MOF-74 for supercapacitorsJournal of Materials Chemistry A, 2015
- Ultrathin Mesoporous NiCo2O4 Nanosheets Supported on Ni Foam as Advanced Electrodes for SupercapacitorsAdvanced Functional Materials, 2012