fig5

Figure 5. High-throughput synthesis and activity evaluation of practical powder catalysts. This figure is adapted from reference^[32] (Figures 2A, 3A, 4F, and 6A) under the terms of the CC BY-NC 4.0 license. HEOs: High-entropy oxides; PEMWE: proton exchange membrane water electrolyzer; CP: carbon paper; PEM: proton exchange membrane; CE: counter electrode; RE: reference electrode; DEMS: differential electrochemical mass spectrometry; ICP-MS: inductively coupled plasma-mass spectrometry.