Energy & Environmental Science, Год журнала: 2024, Номер 17(16), С. 6024 - 6033
Опубликована: Янв. 1, 2024
A H-buffer chain by exploiting the oxygen diversity of confined polyoxometalates to accelerate H-spillover on Pt in HER is designed. typical pathway (Pt → O br O3H Mo/W c PC sub-1-nm ) revealed, which can buffer H-migration barriers.
Язык: Английский
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 4, 2025
The unique hydrogen adsorption characteristics of negatively charged platinum play a crucial role in enhancing the electrocatalytic evolution reaction. However, atomically dispersed Pt atoms are typically anchored to support through non-metallic atom bonds, resulting high oxidation state. Here, oxygen-deficient NiFe-LDH. Electron transfer between and NiFe-LDH occurs primarily Pt─Ni bonds rather than conventional Pt─O bonds. Oxygen vacancies promote additional electron from Ni Pt, thereby reducing valence state adsorption. Meanwhile, elevated increases catalyst's hydrophilicity reduces energy barrier for hydrolysis dissociation. This catalyst demonstrates remarkably low overpotentials 4 9 mV at 10 mA cm-2 1 m KOH KPi, respectively. Additionally, its mass activity is 51.5 23.7 times higher that Pt/C, study presents novel strategy performance rational design coordination environments electronic structures supported metal catalysts.
Язык: Английский
Процитировано
4
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 10, 2025
Abstract The local electrolyte micro‐environment surrounding the catalyst reaction center, including critical factors such as pH, reactant concentration, and electric field, plays a decisive role in electrocatalytic reactions water splitting. Recently, this topic has garnered significant attention due to its potential significantly enhance catalytic performance. While various strategies optimize processes have been explored, deliberate control over fundamental principles guiding these adjustments remain their early stages of development. This review provides comprehensive examination key efforts aimed at designing tailoring localized micro‐environments improve It discusses advances micro‐environmental design, methodologies for evaluating shifts, mechanistic insights driving developments. Additionally, highlights existing challenges prospective industrial applications strategies. By offering detailed analysis recent developments, aims equip researchers with practical knowledge on controlling micro‐environments, thereby accelerating progress toward real‐world processes.
Язык: Английский
Процитировано
3
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 16, 2025
Abstract Proton exchange membrane water electrolysis is one of the most promising techniques for industrial green hydrogen production. However, electrocatalysts production have suffered from low activity and poor durability in acidic environment. Here an integrated electrode composed N‐doped carbon‐coated high‐entropy nanowires (HEA NWs) anchored on a single‐walled carbon nanotube (SWCNT) network reported efficient stable evolution reaction (HER). The residue surfactant remaining HEA NWs prepared by wet chemistry method transformed to layer when fast heating loaded SWCNT film, which firmly connects ultrathin with bundles. When used as electrode, hybrid film showed not only overpotential 42 mV at 100 mA cm −2 HER but also excellent up 1000 h 500 acid solution. desirable performance attributed hierarchical structure where 1D function regulating adsorption H * , facilitating electron transfer, protecting degradation.
Язык: Английский
Процитировано
3
Small, Год журнала: 2023, Номер 19(32)
Опубликована: Апрель 17, 2023
Abstract Pt‐based supported materials, a widely used electrocatalyst for hydrogen evolution reaction (HER), often experience unavoidable electron loss, resulting in mismatching of electronic structure and HER behavior. Here, Pt/WO 3 catalyst consisting Pt species strongly coupled with defective WO polycrystalline nanorods is rationally designed. The engineering sites on can be systematically regulated, so that the optimal electron‐rich ‐600 present an excellent activity only 8 mV overpotential at 10 mA cm −2 . Particularly, mass reaches 7015 mg −1 50 mV, up to 26‐fold higher than commercial Pt/C. combination experimental theoretical results demonstrates O vacancies effectively mitigate tendency transfer from , d‐band center could reach appropriate level relative Fermi level, endowing it suitable This work identifies influence catalytic activity.
Язык: Английский
Процитировано
43
Advanced Materials, Год журнала: 2023, Номер 36(5)
Опубликована: Ноя. 7, 2023
Abstract Developing high‐performance electrocatalysts for alkaline hydrogen oxidation reaction (HOR) is crucial the commercialization of anion exchange membrane fuel cells (AEMFCs). Here, boron interstitially inserted ruthenium (B‐Ru/C) synthesized and used as an anode catalyst AEMFC, achieving a peak power density 1.37 W cm −2 , close to state‐of‐the‐art commercial PtRu catalyst. Unexpectedly, instead monotonous decline HOR kinetics with pH generally believed, inflection point behavior in pH‐dependent on B‐Ru/C observed, showing anomalous that activity under electrolyte surpasses acidic electrolyte. Experimental results functional theory calculations reveal upshifted d‐band center Ru after intervention interstitial can lead enhanced adsorption ability OH H 2 O, which together reduced energy barrier water formation, contributes outstanding performance mass 1.716 mA µg PGM −1 13.4‐fold 5.2‐fold higher than Ru/C Pt/C, respectively.
Язык: Английский
Процитировано
41
Journal of Materials Chemistry A, Год журнала: 2023, Номер 11(8), С. 4355 - 4364
Опубликована: Янв. 1, 2023
The heterointerface strategy of cobalt hydroxide and lanthanum enable excellent electrocatalytic water splitting performance durability.
Язык: Английский
Процитировано
37
Science Bulletin, Год журнала: 2023, Номер 68(19), С. 2190 - 2199
Опубликована: Июль 25, 2023
Язык: Английский
Процитировано
37
Advanced Functional Materials, Год журнала: 2023, Номер 33(41)
Опубликована: Авг. 28, 2023
Abstract Acidic water electrolysis (AWE) has the potential to revolutionize green H 2 generation with flexible partial load range, high gas purity, and rapid system response. However, extensive usage of noble Ru/Ir metals sluggish oxygen evolution reaction (OER) inexpensive O products pose significant challenges in anodes. Herein, it is demonstrated that ultralow Pt single atoms highly porous N‐doped carbons (Pt 1 /p‐NC@CNTs) can effectively catalyze chlorine (CER) for on‐site chlorination replace OER AWE, 200 mV saving at 10 mA cm −2 . As a result, various organic halide motifs pharmaceutical molecules by chlorinating anisole, ketones, olefins be realized, along coproduction. Combined physicochemical characterizations including synchrotron X‐ray absorption spectroscopy, finite element methodsimulations, theory calculations indicate atomic Pt‐N 4 active sites balance adsorption/desorption Cl intermediates (Volmer step) plentiful porosity /p‐NC@CNTs specific surface area 313 m g −1 enriches − around (Heyrovský step), collectively promoting rate‐limiting Volmer–Heyrovský pathway improved CER.
Язык: Английский
Процитировано
35
Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(6)
Опубликована: Дек. 14, 2023
Abstract Recently, hydrogen spillover based binary (HSBB) catalysts have received widespread attention due to the sufficiently utilized reaction sites. However, specific regulation mechanism of intensity is still unclear. Herein, we fabricated oxygen vacancies enriched Ru/NiMoO 4‐x investigate internal relationship between electron supply and enhancement. The DFT calculations cooperate with in situ Raman spectrum uncover that H* from NiMoO Ru. Meanwhile, weakened Ru , which contributes dilute resistance built‐in electric field (BEF) for spillover. In addition, higher ion concentration electrolyte will promote adsorption step obviously, demonstrated by EIS tests. As a result, exhibits low overpotential 206 mV at 3.0 A cm −2 small Tafel slope 28.8 dec −1 an excellent durability 550 h current density 0.5 HER 1.0 M KOH seawater.
Язык: Английский
Процитировано
34
Journal of Alloys and Compounds, Год журнала: 2023, Номер 948, С. 169655 - 169655
Опубликована: Март 13, 2023
Язык: Английский
Процитировано
33