3D PtFe Clusters with Cube‐in‐Cube Structure Enhance Oxygen Reduction Catalysis and Electrochemical Sensing

Lin, Fang; Sun, Yingjun; Lai, Jianping; Wang, Kai; Tang, Yonghua; Chao, Yuguang; Yang, Yong; Feng, Jianrui; Lv, Fan; Zhou, Peng; Huang, Minghua; Guo, Shaojun

doi:10.1002/smtd.201800073

Cited by 36 publications

(22 citation statements)

References 67 publications

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“…[ 298–300 ] Furthermore, ORR is a rate‐limiting step of fuel cells. [ 301–305 ] However, the effects of external fields on these electrocatalysis have by far been rarely investigated. In theory, external field‐assisted ORR, NRR, and CO 2 RR are also feasible.…”

Section: Discussionmentioning

confidence: 99%

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

et al. 2020

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promising alternative to fossil fuels. Water electrolysis by renewable resourcederived electricity represents a facile and green route to produce H 2. [1-13] Generally, the key to implement high-performance water splitting is to develop economically viable, efficient, and robust electrocatalysts to lower the activation potential barriers. Thus far, researchers have devoted extensive enthusiasm to the investigation of electrocatalysts. Currently, most efforts have been taken on the search for new materials, [14-16] regulation of morphology, [17] crystallinity, [18] facet, [19] component, [20-24] defect, [25,26] matter phase, [27,28] or the compositing of various materials with synergy. [29-36] However, the performances of emerging nonnoble electrocatalysts still lag behind those of noble ones. To address this issue, researchers have turned their attention beyond the electrocatalysts themselves. Field-assisted electrocatalysis is the electrocatalytic reaction proceeded in the presence of a field. It represents a promising methodology since it exerts an additional degree of freedom to engineer an electrochemical process. Inspiringly, indisputable improvements in electrocatalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been implemented with the assist of various fields, including electric field, magnetic field, strain, and light. For example, the electrocatalytic HER of a MoS 2 nanosheet is markedly boosted by simply exploiting a back gate voltage of 5 V. [37] Its overpotential at −100 mA cm −2 is decreased from 240 to 38 mV. In addition, enhancement of alkaline water electrolysis is achieved by applying a moderate magnetic field (≤450 mT) to an electrocatalytic anode consists of highly magnetic electrocatalysts. [38] Its current density increments are beyond 100%. Furthermore, the HER activity of β-PdH x increases monotonically as the applied strain increases from 0% to 4.5%. [39] Lastly, an approximately threefold increase in current density of Au-MoS 2 for electrocatalytic HER is realized upon the illumination of IR light. [40] These results undoubtedly elucidate that applying a field during electrocataly sis opens up great opportunities toward further improving electrocatalytic activity. Moreover, this approach provides merits of facile, dynamical, continuous, reversible, and universal control. Despite fascinating achievements, these investigations are relatively scattered. The underneath mechanisms and principles Hydrogen fuel is considered as one of the most clean renewable resources, warranting it a primary alternative to fossil fuels for future energy supplies. Electrocatalytic water splitting is an eco-friendly technique for high-purity hydrogen production. However, the sluggish dynamics of its two halfreactions, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), are tough challenges impeding the practical application of this technology. In these years, external field-assisted HER and OER have attracted extensive research interests. Herein, the effects o...

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Section: Discussionmentioning

confidence: 99%

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

et al. 2020

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“…The quaternary ammonium halides are often used as capping agents for the synthesis of noble‐metal nanocrystals. To data, commonly used quaternary ammonium halides include CTAB, [ 100–105 ] cetyltrimethylammonium chloride, [ 106–109 ] octadecyltrimethylammonium chloride, [ 110,111 ] tetradecyltrimethylammonium bromide, [ 112–114 ] dioctadecyldimethylammonium chloride (DODAC), [ 115–117 ] dodecyltrimethylammonium chloride, [ 118 ] and so on. Their headgroups and long alkyl chains may selectively adsorb on different crystal planes, leading to the formation of anisotropy crystals.…”

Section: Amino‐based Small Moleculesmentioning

confidence: 99%

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

et al. 2021

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Morphology‐control synthesis is an effective means to tailor surface structure of noble‐metal nanocrystals, which offers a sensitive knob for tuning their electrocatalytic properties. The functional molecules are often indispensable in the morphology‐control synthesis through preferential adsorption on specific crystal facets, or controlling certain crystal growth directions. In this review, the recent progress in morphology‐control synthesis of noble‐metal nanocrystals assisted by amino‐based functional molecules for electrocatalytic applications are focused on. Although a mass of noble‐metal nanocrystals with different morphologies have been reported, few review studies have been published related to amino‐based molecules assisted control strategy. A full understanding for the key roles of amino‐based molecules in the morphology‐control synthesis is still necessary. As a result, the explicit roles and mechanisms of various types of amino‐based molecules, including amino‐based small molecules and amino‐based polymers, in morphology‐control of noble‐metal nanocrystals are summarized and discussed in detail. Also presented in this progress are unique electrocatalytic properties of various shaped noble‐metal nanocrystals. Particularly, the optimization of electrocatalytic selectivity induced by specific amino‐based functional molecules (e.g., polyallylamine and polyethyleneimine) is highlighted. At the end, some critical prospects, and challenges in terms of amino‐based molecules‐controlled synthesis and electrocatalytic applications are proposed.

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“…[15][16][17] To address this issue, previous efforts have focused on the design and synthesis of surface-modified Pt-based catalysts, such as via the Clavilier method, to promote the oxidation of CO ad , while the synthetic conditions are harsh and complex. [18][19][20][21] At present, increasing efforts have been aimed at designing Pt nanoparticles (NPs, size is larger than ≈3 nm) and nanoclusters (NCs, typical in the size range from 1 to 3 nm) with ultrafine size, so as to maximize the utilization of Pt and improve its electrocatalytic activity in DMFCs. [22][23][24] While downsizing Pt particle as well as decreasing its loading appear to be viable strategies, using conventional wet impregnation method with subsequent reduction treatment remains insufficient to simultaneously enhance the electrochemical activity and lower the cost.…”

Section: Doi: 101002/smtd202000265mentioning

confidence: 99%

Thermal Radiation Synthesis of Ultrafine Platinum Nanoclusters toward Methanol Oxidation

Qiao

Liu

et al. 2020

Small Methods

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Direct methanol fuel cells (DMFCs) are considered as a promising candidate for portable electronic devices and small electric vehicles due to their high gravimetric and volumetric energy densities. The operation of DMFCs requires efficient catalysts, especially on the anode to promote methanol oxidation reaction (MOR). To date, platinum has emerged as a chief contender for MOR. Unfortunately, most catalysts suffer from severe CO poisoning, which can passivate the catalytic surface and decrease the activity over time. Herein, a transient, thermal radiation method to synthesize ultrafine platinum nanoclusters (0.68 ± 0.13 nm) supported on carbon black (Pt NC/CB) is demonstrated. The sample demonstrates a great CO poisoning resistance and excellent activity toward MOR. The ultrafine platinum nanoclusters with increased active sites can promote the oxidation of CO at potential as low as 0.4 V. The Pt NC/CB displays an onset potential of 0.4 V and a peak current density of 1.30 mA cm−2ECSA (electrochemical active surface area), which is superior than that of reported catalysts (0.57–1.06 mA cm−2ECSA), while many of the catalysts are alloys involving noble metals. This work showcases an efficient method to prepare Pt nanoclusters with high MOR activity and great CO poisoning resistance.

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3D PtFe Clusters with Cube‐in‐Cube Structure Enhance Oxygen Reduction Catalysis and Electrochemical Sensing

Cited by 36 publications

References 67 publications

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

Promoting Electrocatalytic Hydrogen Evolution Reaction and Oxygen Evolution Reaction by Fields: Effects of Electric Field, Magnetic Field, Strain, and Light

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

Thermal Radiation Synthesis of Ultrafine Platinum Nanoclusters toward Methanol Oxidation

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