A porous solid electrolyte interface enables efficient electroreduction of captured carbon to CO

By Gong, Xia, Zhai +12Nature CommunicationsOct 22, 2026

Score████░░░░░░4.3

Key numbers

90% at 200 mA cm-2

VerdictWorth a reader's time today.

Read the original

Abstract

Direct electrochemical conversion of captured carbon species offers a route to avoid the energy-intensive steps of thermal CO2 release, compression and transport in conventional carbon capture and utilization. In proton exchange membrane (PEM) reactors, however, the acidic cathode environment promotes hydrogen evolution and limits CO2 regeneration from (bi)carbonate capture media, resulting in low carbon utilization and high energy demand. Here we show a modular PEM–porous solid electrolyte (PSE) reactor for direct conversion of (bi)carbonate to CO. Using a transparent cell with in situ visualization, we reveal that the PSE regulates proton transport, reduces local proton reduction, limits bubble accumulation and facilitates CO2 transport to the cathode. The PEM–PSE reactor achieves a CO Faradaic efficiency of 90% at 200 mA cm−2, a carbon efficiency of 84%, and an energy consumption of ~26.0 GJ t−1 CO. It operates at current densities up to 800 mA cm−2, reaching a CO rate of ~8.0 mmol h−1 cm−2. These results highlight the regulation of proton and gas transport in the electrochemical conversion of captured carbon. Turning captured carbon dioxide into useful chemicals can save energy, but combining capture and conversion is difficult. Here, the authors report a membrane reactor converts bicarbonate solutions directly into carbon monoxide with high carbon efficiency and lower energy use.

Shanhe Gong, Qing Xia, Yanjie Zhai, Weisong Li, Jie Wu, Yingying Zhou, Yucong Liao, Kuang Zhu, Yuchen Yang, Yile Yang, Xiaojie She, Zhaolong Wang, Huaming Li, Xiao Zhang, Shu Ping Lau

The editor's rubric

Heuristic review

Leverage3 / 5: A method or resource many groups across the field will adopt within a year.; 16% of this desk’s rubric
Magnitude2 / 5: Solid incremental gain on a meaningful problem.; 20% of this desk’s rubric
Evidence3 / 5: Solid: multiple benchmarks or cohorts, ablations, fair baselines, released code or data.; 20% of this desk’s rubric
Novelty3 / 5: A genuinely new approach to an open problem.; 10% of this desk’s rubric
Trajectory2 / 5: Some room to improve with obvious engineering.; 14% of this desk’s rubric
Stakes3 / 5: Meaningful benefit to many people within a few years.; 20% of this desk’s rubric

Dimension	Level	Weight	What that level means
Leverage	███░░ 3	16%	A method or resource many groups across the field will adopt within a year.
Magnitude	██░░░ 2	20%	Solid incremental gain on a meaningful problem.
Evidence	███░░ 3	20%	Solid: multiple benchmarks or cohorts, ablations, fair baselines, released code or data.
Novelty	███░░ 3	10%	A genuinely new approach to an open problem.
Trajectory	██░░░ 2	14%	Some room to improve with obvious engineering.
Stakes	███░░ 3	20%	Meaningful benefit to many people within a few years.

Editor’s rationale

Heuristic triage from title and abstract text only, not a reading of the paper. Cues found: method (we report); novelty (discovery); scale (efficient); stakes (energy, climate).

How the score was computed

rank-2026-10-18

Score████░░░░░░4.3

Score = 10 × (75% × adjusted merit / 10 + 15% × attention + 10% × freshness)

Desks place stronger verdicts first, then use this score to order work within the same verdict.

Merit: 5.3 / 10; Weighted rubric, evidence-gated.
Adjusted merit: 4.5 / 10; Shrunk toward the desk prior by editor confidence (40%).
Attention: 0%; Citations, upvotes, points, mentions.
Freshness: 91%; Half-life decay since publication.

Citations0 (reference 15, via openalex, Oct 23, 2026, 07:03 UTC)

The record

Reviewed by heuristic-v7 on Oct 23, 2026, 07:03 UTC. Paper type: method.
Categories: CO2 Reduction Techniques and Catalysts, Electrocatalysts for Energy Conversion, Carbon Dioxide Capture Technologies, Renewable Energy, Sustainability and the Environment, Energy
TOP, No.6 in the Climate & Energy edition of October 23, 2026.