This study investigates the enhancement of anion exchange membrane water electrolyzers (AEMWEs) by doping amorphous metal oxide catalysts with chromium. The researchers synthesized a series of FeCrOₓ, CoCrOₓ, and NiCrOₓ catalysts using a one-step liquid-phase reduction method. Key findings include: 1. **Catalyst Synthesis and Characterization**: The catalysts were prepared through a simple, cost-effective method, resulting in porous, amorphous structures with uniform distribution of elements. Techniques such as SEM, TEM, XRD, EDS, and EXAFS were used to characterize the catalysts. 2. **Electrocatalytic Activity**: Among the catalysts, CoCrOₓ demonstrated superior performance, achieving a high current density of 1.5 A cm⁻² at 2.1 V and maintaining this performance for over 120 hours with minimal degradation. This was attributed to the enhanced adsorption energy of the oxygen intermediate and lower oxidation barriers. 3. **Valence State and Local Structure Evolution**: In-situ synchrotron radiation techniques were employed to monitor the valence state and local structure changes during the oxygen evolution reaction (OER). Results showed that the valence state of Co increased during the OER process, leading to improved catalytic activity. The shorter Co-O bond lengths and higher coordination numbers contributed to the enhanced performance. 4. **Mechanism Investigation**: Density functional theory (DFT) calculations and in-situ soft X-ray absorption spectroscopy (XAS) were used to understand the reaction mechanisms. The results indicated that the optimized adsorption of the oxygen intermediate and the dynamic reconfiguration of the catalyst's structure played crucial roles in the enhanced OER activity. 5. **Industrial Potential**: The CoCrOₓ catalyst showed promising industrial potential, achieving high current density and long-term stability in AEMWEs. The study provides valuable insights into the design of high-efficiency AEMWEs and highlights the importance of electronic structure modulation in enhancing catalytic activity. Overall, this research advances the understanding and application of amorphous metal oxide catalysts in AEMWEs, offering a promising approach for sustainable energy conversion technologies.This study investigates the enhancement of anion exchange membrane water electrolyzers (AEMWEs) by doping amorphous metal oxide catalysts with chromium. The researchers synthesized a series of FeCrOₓ, CoCrOₓ, and NiCrOₓ catalysts using a one-step liquid-phase reduction method. Key findings include: 1. **Catalyst Synthesis and Characterization**: The catalysts were prepared through a simple, cost-effective method, resulting in porous, amorphous structures with uniform distribution of elements. Techniques such as SEM, TEM, XRD, EDS, and EXAFS were used to characterize the catalysts. 2. **Electrocatalytic Activity**: Among the catalysts, CoCrOₓ demonstrated superior performance, achieving a high current density of 1.5 A cm⁻² at 2.1 V and maintaining this performance for over 120 hours with minimal degradation. This was attributed to the enhanced adsorption energy of the oxygen intermediate and lower oxidation barriers. 3. **Valence State and Local Structure Evolution**: In-situ synchrotron radiation techniques were employed to monitor the valence state and local structure changes during the oxygen evolution reaction (OER). Results showed that the valence state of Co increased during the OER process, leading to improved catalytic activity. The shorter Co-O bond lengths and higher coordination numbers contributed to the enhanced performance. 4. **Mechanism Investigation**: Density functional theory (DFT) calculations and in-situ soft X-ray absorption spectroscopy (XAS) were used to understand the reaction mechanisms. The results indicated that the optimized adsorption of the oxygen intermediate and the dynamic reconfiguration of the catalyst's structure played crucial roles in the enhanced OER activity. 5. **Industrial Potential**: The CoCrOₓ catalyst showed promising industrial potential, achieving high current density and long-term stability in AEMWEs. The study provides valuable insights into the design of high-efficiency AEMWEs and highlights the importance of electronic structure modulation in enhancing catalytic activity. Overall, this research advances the understanding and application of amorphous metal oxide catalysts in AEMWEs, offering a promising approach for sustainable energy conversion technologies.