TY - JOUR AU - Cliffton Ray Wang AU - John M Stansberry AU - Rangachary Mukundan AU - Hung-Ming Joseph Chang AU - Devashish Kulkarni AU - Andrew M Park AU - Austin B Plymill AU - Nausir Mahmoud Firas AU - Christopher Pantayatiwong Liu AU - Jack T Lang AU - Jason Keonhag Lee AU - Nadia E Tolouei AU - Yu Morimoto AU - CH Wang AU - Gaohua Zhu AU - Jack Brouwer AU - Plamen Atanassov AU - Christopher B Capuano AU - Cortney Mittelsteadt AU - Xiong Peng AU - Iryna V Zenyuk AB -

Hydrogen produced with no greenhouse gas emissions is termed “green hydrogen” and will be essential to reaching decarbonization targets set forth by nearly every country as per the Paris Agreement. Proton exchange membrane water electrolyzers (PEMWEs) are expected to contribute substantially to the green hydrogen market. However, PEMWE market penetration is insignificant, accounting for less than a gigawatt of global capacity. Achieving substantive decarbonization via green hydrogen will require PEMWEs to reach capacities of hundreds of gigawatts by 2030. This paper serves as an overarching roadmap for cell-level improvements necessary for gigawatt-scale PEMWE deployment, with insights from three well-established hydrogen technology companies included. Analyses will be presented for economies of scale, renewable energy prices, government policies, accelerated stress tests, and component-specific improvements.

BT - Chemical Reviews DA - 12/02/2025 DO - 10.1021/acs.chemrev.3c00904 IS - 3 N2 -

Hydrogen produced with no greenhouse gas emissions is termed “green hydrogen” and will be essential to reaching decarbonization targets set forth by nearly every country as per the Paris Agreement. Proton exchange membrane water electrolyzers (PEMWEs) are expected to contribute substantially to the green hydrogen market. However, PEMWE market penetration is insignificant, accounting for less than a gigawatt of global capacity. Achieving substantive decarbonization via green hydrogen will require PEMWEs to reach capacities of hundreds of gigawatts by 2030. This paper serves as an overarching roadmap for cell-level improvements necessary for gigawatt-scale PEMWE deployment, with insights from three well-established hydrogen technology companies included. Analyses will be presented for economies of scale, renewable energy prices, government policies, accelerated stress tests, and component-specific improvements.

PB - American Chemical Society (ACS) PY - 2025 SP - 1257 EP - 1302 T2 - Chemical Reviews TI - Proton Exchange Membrane (PEM) Water Electrolysis: Cell-Level Considerations for Gigawatt-Scale Deployment UR - https://doi.org/10.1021/acs.chemrev.3c00904 VL - 125 SN - 0009-2665, 1520-6890 ER -