Tohoku University · 에너지
Huihui Li 교수의 연구실은 전기화학적 CO₂ 환원 반응을 통한 다탄소 제품 생산에 초점을 맞추고 있으며, 특히 구리 기반 촉매의 선택성과 안정성을 향상시키기 위한 나노구조 설계 및 표면 환경 제어 기반의 혁신적 전략을 개발하고 있습니다. 산소 공여체, 인 도핑, 다공성 네트워크 등 다양한 전략을 통해 촉매 표면의 산화구리(II) 상태를 안정화하고 중간체를 국소적으로 봉인함으로써 고효율·고안정성 반응을 실현하고자 합니다. 또한, 반응 조건 하에서의 진정한 표면 구조 이해를 위해 실험과 수치 시뮬레이션을 융합한 표준 연구 프레임워크를 제안하며, 전기촉매 설계의 원리적 이해를 심화하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Electrochemical CO2 reduction (CO2R) to valuable multicarbon (C2+) products is an attractive means for upgrading waste CO2. One of the intensively studied strategies is to apply concentrated KOH solution to extensively proceed with CO2R to C2+ products; however, the undesired carbonate formation at the cathode consumes majority of the input CO2. Therefore, it is crucial to seek a new strategy to improve the local environment at the electrode and thus eliminate or reduce dependence of the selecti
Abstract Copper oxide nanomaterials have been suggested to be efficient for highly selective multi‐carbon (C 2+ ) production in CO 2 reduction reaction (CO 2 RR), due to the introduction of surface Cu + species from oxide catalysts. However, the Cu + species on the catalyst surface are prone to being reduced to Cu 0 under reductive conditions during CO 2 RR. Here, a network‐structured catalyst is developed consisting of ultrafine Cu 2 O/CuO nanoparticles that harbor an abundance of pores. This c
Authentic surface structures under reaction conditions determine the activity and selectivity of electrocatalysts, therefore, the knowledge of the structure-activity relationship can facilitate the design of efficient catalyst structures for specific reactivity requirements. However, understanding the relationship between a more realistic active surface and its performance is challenging due to the complicated interface microenvironment in electrocatalysis. Herein, we proposed a standard researc
The electrochemical carbon dioxide (CO<sub>2</sub>) reduction reaction (CO<sub>2</sub>RR) involves a multistep proton-coupled electron transfer (PCET) process that generates a variety of intermediates, making it challenging to transform them into target products with high activity and selectivity. Here, a catalyst featuring a nanosheet-stacked sphere structure with numerous open and deep conical cavities (OD-CCs) is reported. Under the guidance of the finite-element method (FEM) simulations and
Copper (Cu)-based electrocatalysts are acknowledged as pivotal catalysts for the electroreduction of CO<sub>2</sub> into multicarbon (C<sub>2+</sub>) products; however, achieving high C<sub>2+</sub> selectivity at industrial-level current densities remains a significant challenge. Herein, we propose a "phosphorus (P)-doping mediation" strategy to introduce an oxygen vacancy into the Cu<sub>2</sub>O lattice, resulting in a C<sub>2+</sub> Faradaic efficiency of 87.0% at a partial current density o
The rational design of efficient electrocatalysts with controllable structure and composition is crucial for enhancing the lifetime and cost-effectiveness of oxygen reduction reaction (ORR). PtCo nanocrystals have gained attention due to their exceptional activity, yet suffer from stability issues in acidic media. Herein, an active and highly stable electrocatalyst is developed, namely 3D Pt<sub>7</sub>Co<sub>3</sub>@Pt core-shell nanodendrites (NDs), which are formed through the self-assembly o
Abstract The electrochemical CO 2 reduction reaction (CO 2 RR) to multi‐carbon (C 2+ ) products derived by renewable energy represents a promising strategy for mitigating CO 2 emissions. One of the intensively studied strategies is to stabilize Cu + species on catalysts to facilitate the adsorption of *CO intermediates. However, the reductive environment during CO 2 RR renders the Cu + species on the catalyst surface susceptible to reduction to Cu 0 . Here, we developed a GB‐Cu 2 O‐Cu catalyst f
Abstract Authentic surface structures under reaction conditions determine the activity and selectivity of electrocatalysts, therefore, the knowledge of the structure‐activity relationship can facilitate the design of efficient catalyst structures for specific reactivity requirements. However, understanding the relationship between a more realistic active surface and its performance is challenging due to the complicated interface microenvironment in electrocatalysis. Herein, we proposed a standar
Abstract The electrochemical conversion of CO 2 into carbonaceous fuels and chemicals emerges as a promising sustainable strategy toward energy‐rich chemical feedstocks. However, CO 2 reduction reaction (CO 2 RR) in aqueous environments is highly intricate, as protons may be directly reduced to H 2 . Here, we propose a “dual‐functional oleic acid (OA) coordination” strategy that simultaneously stabilizes Cu + /Cu 0 interface via covalent OCu chelating bonds and tailors hydrophobic gas–liquid–so
