Nickel Enhances InPd-Catalyzed Nitrate Reduction Activity and N2 Selectivity DOI
Kiheon Hong, Daniel J. Rivera, Juan Donoso

и другие.

ACS ES&T Engineering, Год журнала: 2024, Номер unknown

Опубликована: Окт. 24, 2024

Palladium–indium (PdIn) is a well-established bimetallic composition for reductively degrading nitrate anions, one of the most ubiquitous contaminants in groundwater. However, scarcity and variable price these rare-earth platinum group critical metals may hinder their use water treatment. Nickel (Ni), nonprecious metal same element as Pd, could partially replace lower Pd usage if resulting trimetallic sufficiently catalytically active. Herein, we report synthesis reduction catalysis activated carbon-supported "In-on-Pd-on-Ni" catalysts (InPdNi/AC). While InPd/AC (0.05 wt % In, 1.3 Pd) was expectedly active, InPdNi/AC containing In amount, much less (0.1 %), 1 Ni >17 more active (kcat ≈ 20 vs 349 L min–1 gsurface metal–1). X-ray photoelectron spectroscopy (XPS) density functional theory (DFT) calculations showed that gained electron from Ni, correlating to increased activity. Ammonium byproduct selectivity (18% at 50% conversion) compared (48%), suggestive higher surface coverage NO or its greater reactivity with NO2–, which led N2. Accounting catalyst precursor, manufacturing costs, spent recovery, calculated incorporation lowered net cost significantly (from $1028/kg $170/kg). The lowered, by ∼26 times, stirred tank reactor sized treatment capacity case. results demonstrate partial replacement precious an earth-abundant leads efficiency denitrification catalyst, via material strategy should be beneficial other clean-water catalytic systems.

Язык: Английский

Enhancing Compatibility of Two‐Step Tandem Catalytic Nitrate Reduction to Ammonia Over P‐Cu/Co(OH)2 DOI

Qiuyu Yan,

Rundong Zhao, Lihong Yu

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 11, 2024

Abstract Electrochemical nitrate reduction reaction (NO 3 RR) is a promising approach to realize ammonia generation and wastewater treatment. However, the transformation from NO − NH involves multiple proton‐coupled electron transfer processes by‐products 2 , H etc.), making high selectivity challenge. Herein, two‐phase nanoflower P‐Cu/Co(OH) electrocatalyst consisting of P‐Cu clusters P‐Co(OH) nanosheets designed match two‐step tandem process ) more compatible, avoiding excessive accumulation optimizing whole reaction. Focusing on initial 2e process, inhibited * desorption Cu sites in gives rise appropriate released electrolyte. Subsequently, exhibits superior capacity for trapping transforming desorbed during latter 6e due thermodynamic advantage contributions active hydrogen. In 1 m KOH + 0.1 leads yield rate 42.63 mg h cm Faradaic efficiency 97.04% at −0.4 V versus reversible hydrogen electrode. Such well‐matched achieves remarkable synthesis performance perspective catalytic reaction, offering novel guideline design RR electrocatalysts.

Язык: Английский

Процитировано

23
Co‐Catalytic Metal‐Support Interactions Design on Single‐Atom Alloy for Boosted Electro‐Reduction of Nitrate to Nitrogen DOI
Ziyang Wu, Xuxin Kang, Sen Wang

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер 34(45)

Опубликована: Май 28, 2024

Abstract The past decades have seen considerable imbalances in the nitrogen cycle due to excessive use of nitrate agriculture and industry. Electrocatalytic reduction (NO 3 RR) (N 2 ) holds significant potential for addressing pollution wastewater but suffers from nitrite formation sluggish hydrogeneration process. Here a single atom alloy (SAA) catalyst featuring atomically dispersed Ru on 2D Ni metal (Ru 1 Ni), proving remarkable performance − –N conversion (≈93%) N selectivity (≈99%)) through co‐catalytic metal‐support interactions (CMSI) effect is reported. Significantly, SAA achieves NO RR removal capacity as high 11.1 mg L −1 h cm −2 with 20 cycles stability (9 per cycle), surpassing most previously reported works. core boosting lies synergistically promoted activation accelerated hydrogenation oxide intermediates site substrate, respectively, revealed by various situ experiments theoretical simulations. DFT calculations indicate electron transfer substrate more robust interaction between Ru–Ni comparison that Ni–Ni. This work offers resilient methodology rational design highly efficient electrocatalysts CMSI modulation RR, illuminating arena treatment cycle.

Язык: Английский

Процитировано

18
Magneto‐Electrochemical Ammonia Synthesis: Boosting Nitrite Reduction Activity by the Optimized Magnetic Field Induced Spin Polarized System DOI
Ashadul Adalder, Koushik Mitra,

Narad Barman

и другие.

Advanced Energy Materials, Год журнала: 2024, Номер 14(42)

Опубликована: Сен. 25, 2024

Abstract Using low and optimized magnetic field along with electric is a novel strategy to facilitate electrochemical nitrite reduction reaction (NO 2 RR). Herein, the assisted electrocatalytic ammonia synthesis employing spin‐thrusted β‐MnPc at 95 mT explored. The calculated rate of generation 16603.4 µg h −1 mg cat , which almost twice that nonpolarized manganese phthalocyanine (MnPc) catalyst. Additionally, Faradaic efficiency (FE) –0.9 V versus RHE found be 92.9%, significantly higher compared MnPc In presence external field, catalysts provide better electron transfer channel results in lower charge resistance hence performances. Density functional theory (DFT) result further verifies induced has potential barrier (0.51 eV) for protonation NO* than (1.08 eV), confirms enhanced ammonia.

Язык: Английский

Процитировано

15
Effects of Ionic Interferents on Electrocatalytic Nitrate Reduction: Mechanistic Insight DOI

Jinling Fan,

Leslie Arrazolo,

Jiaxin Du

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 58(29), С. 12823 - 12845

Опубликована: Июль 2, 2024

Nitrate, a prevalent water pollutant, poses substantial public health concerns and environmental risks. Electrochemical reduction of nitrate (eNO

Язык: Английский

Процитировано

13
Developing energy-efficient nitrate-to-ammonia flow cells with bifunctional NiFeW-oxide thin-film electrodes made by magnetron sputtering technique DOI
Quoc‐Nam Ha,

Wen-Chuan Hsiao,

Yu-Chan Chan

и другие.

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 354, С. 124137 - 124137

Опубликована: Апрель 27, 2024

Язык: Английский

Процитировано

11
Perovskite Oxides: Syntheses and Perspectives on Their Application for Nitrate Reduction DOI Creative Commons
Ajibola A. Bayode, Odunayo T. Ore,

Esther A. Nnamani

и другие.

ACS Omega, Год журнала: 2024, Номер 9(18), С. 19770 - 19785

Опубликована: Апрель 23, 2024

Over the decades, rise in nitrate levels ecosystem has posed a serious threat to continuous existence of humans, fauna, and flora. The deleterious effects increasing nitrates have led adverse health environmental implications form methemoglobinemia eutrophication, respectively. Different pathways/routes for syntheses perovskites their oxides were presented this review. In recent times, electrocatalytic reduction emerged as most utilized technique conversion into ammonia, an industrial feedstock. According published papers, efficiency various used achieved high Faradaic 98%. Furthermore, studies shown that there is need improve chemical stability during scale-up applications, well scalability applications.

Язык: Английский

Процитировано

6
Zeolitic imidazolate framework derived Fe catalyst electrocatalytic-driven atomic hydrogen for efficient reduction of nitrate to N2 DOI

Xi Ma,

Jiapeng Zhong,

Rongyue Wang

и другие.

Journal of Hazardous Materials, Год журнала: 2024, Номер 471, С. 134354 - 134354

Опубликована: Апрель 19, 2024

Язык: Английский

Процитировано

5
Enhancing electrocatalytic nitrate/nitric oxide reduction to NH3 on two-dimensional p-block InSe monolayer via defect engineering DOI
Xuxin Kang, Qingchao Fang,

Hanqing Yin

и другие.

Molecular Catalysis, Год журнала: 2024, Номер 568, С. 114477 - 114477

Опубликована: Авг. 27, 2024

Язык: Английский

Процитировано

4
Enhanced Activity and Stability for Electrocatalytic Nitrate Reduction to Ammonia over Low‐Coordinated Cobalt DOI Open Access

Wanping Sun,

Ying Xu, Yang Li

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

It is still challenging to develop an effective strategy simultaneously enhance the activity and stability of electrocatalysts for electrocatalytic nitrate reduction reaction (eNO3RR). Herein, taking metallic cobalt as example, it demonstrated that construction low-coordinated nanosheets (L-Co NSs) by H2 plasma etching electrodeposited (Co can greatly eNO3RR. Compared with Co NSs, at -0.4 V versus RHE, removal rate, ammonia partial current density, yield are increased L-Co NSs from 82.14% 98.57%, 476 683 mA cm-2, 2.11 2.54 mmol h-1 respectively. In addition, demonstrate negligible decay after 30 cycles test, while show significant decline. situ electrochemical characterizations theoretical calculations verify abundance vacancies in not only contribute optimized electronic structure enhanced desorption key intermediate boost but also facilitate transformation Co(OH)2 Co0 promote stability. Furthermore, exhibit favorable performance removing simulated wastewater air discharge-electrocatalytic cascade system produce ammonia.

Язык: Английский

Процитировано

0
Stepwise H*-Mediated and Non-H* Reduction Processes for Highly Selective Transformation of Nitrate to Nitrogen Gas Using a ZVAl-Based Material DOI
Yan Li, Wenjie Liu, Hua Zhu

и другие.

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

Improving the reduction efficiency and N2 selectivity is important for nitrate decontamination. A novel ternary ball-milled Al-Cu-AC material reported to achieve a highly selective of N2. The process, driven by continuous dissolution zero-valent aluminum (ZVAl), demonstrated stepwise scheme. interesting shift in electron-donating pathways was ascribed spontaneous change microenvironmental pH from neutral alkaline. (1:1:5 mass ratio) completely removed 30 mg/L NO3--N over wide range (5-9), achieving 83% TN removal N2-selectivity, without detectable copper leaching. atomic hydrogen (H*)-mediated occurring on Cu component proven be crucial fast transformation NO3- NO2-, while non-H* process dominated electrochemical NO2- AC cathode Al || microgalvanic cells formed material. primary route identified as *NOH pathway, superiority toward verified with actual wastewater. This study revealed how influenced ZVAl provides new approach maximize performance metals.

Язык: Английский

Процитировано

0