biostudies-literatureSugawara YKato Foundation for Promotion of ScienceEnvironmental Restoration and Conservation AgencyMinistry of Education, Culture, Sports, Science and TechnologyPrecursory Research for Embryonic Science and TechnologyJapan Science and Technology AgencyAdvanced Low Carbon Technology Research and Development ProgramJapan Society for the Promotion of Science22487-22497https://www.ebi.ac.uk/biostudies/studies/S-EPMC12012771biostudies-literatureUnknown17(15)Green hydrogen production via electrochemical water splitting extensively demands the development of cost-effective and highly efficient electrocatalysts for the anodic oxygen evolution reaction (OER). Nanosized spinel nanoparticles (nanospinels) are potential candidates as electrocatalysts for the OER because of their very high specific surface areas. This work systematically investigated the influence of the A-site metals in the Mn-based nanospinels, i.e., LiMn<sub>2</sub>O<sub>4</sub>, MgMn<sub>2</sub>O<sub>4</sub>, ZnMn<sub>2</sub>O<sub>4</sub>, NiMn<sub>2</sub>O<sub>4</sub>, CuMn<sub>2</sub>O<sub>4</sub>, and CoMn<sub>2</sub>O<sub>4</sub>. Evaluation of their OER activities then indicated that higher OER activities for NiMn<sub>2</sub>O<sub>4</sub> and CoMn<sub>2</sub>O<sub>4</sub> thACS applied materials & interfacesUltrasmall Manganese Nanospinels Produced via an Alcohol Reduction Method and Their Electrocatalytic Oxygen Evolution Reactivity.PMC12012771JPMEERF20212R0120K15087JPMJPR2371JPMJAL130122H0217523KK0103JPMJGX23S1Nasu AMatsui MIimura RIwase KSugawara YYamaguchi TYabu TKobayashi HHonma IfalseUltrasmall Manganese Nanospinels Produced via an Alcohol Reduction Method and Their Electrocatalytic Oxygen Evolution Reactivity.Green hydrogen production via electrochemical water splitting extensively demands the development of cost-effective and highly efficient electrocatalysts for the anodic oxygen evolution reaction (OER). Nanosized spinel nanoparticles (nanospinels) are potential candidates as electrocatalysts for the OER because of their very high specific surface areas. This work systematically investigated the influence of the A-site metals in the Mn-based nanospinels, i.e., LiMn<sub>2</sub>O<sub>4</sub>, MgMn<sub>2</sub>O<sub>4</sub>, ZnMn<sub>2</sub>O<sub>4</sub>, NiMn<sub>2</sub>O<sub>4</sub>, CuMn<sub>2</sub>O<sub>4</sub>, and CoMn<sub>2</sub>O<sub>4</sub>. Evaluation of their OER activities then indicated that higher OER activities for NiMn<sub>2</sub>O<sub>4</sub> and CoMn<sub>2</sub>O<sub>4</sub> th2025-01-01T00:00:00Z2025 Apr2025-07-11T03:04:11.262Z2025-07-11T03:04:11.262ZS-EPMC120127714019017010.1021/acsami.4c18777