Cathodic activation of titanium-supported gold nanoparticles: An efficient and stable electrocatalyst for the hydrogen evolution reaction

Amin, Mohammed A.; Fadlallah, Sahar A.; Alosaimi, Ghaida; Kandemi̇rlı, Fatma; Saraçoğlu, Murat; Szunerits, Sabine; Boukherroub, Rabah

doi:10.1016/j.ijhydene.2016.02.107

Cited by 36 publications

(23 citation statements)

References 66 publications

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“…To calculate the elements of such RC networks, and hence gain more insight into the HER kinetics associated with EIS measurements, the experimental impedance data were tted using the equivalent circuit presented and fully described elsewhere. 58 The obtained tting parameters are presented in Table 2 as a function of the applied cathodic overpotentials. It follows from Table 2 that, for any tested catalyst, the values of R 1 and R 2 decrease as the applied cathodic overpotential made more negative, referring to enhanced HER kinetics.…”

Section: -58mentioning

confidence: 99%

Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation

et al. 2017

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The electrochemical and corrosion behaviour of Co 50 Ni 23 Ga 27Àx Al x (x ¼ 0 and 1.0 wt%) magnetic shape memory alloys (MSMAs) was studied in 0.5 M NaCl solutions using various electrochemical techniques.Results showed remarkable activation of the tested MSMA toward pitting corrosion upon alloying it with Al. XPS examination confirmed the activation influence of alloyed Al. It proved that the presence of Al in the alloy's matrix weakens its passivity, as manifested by a lower amount of gallium oxides and Cl and FE $ 100%). Our best catalyst also showed good stability and durability after 3000 cycles of cathodic polarization between the corrosion potential (E corr ) and À1.0 V vs. RHE, and 24 h of electrolysis at a high cathodic current density of 100 mA cm À2. Microstructure changes made by Al, together with findings obtained from SEM/EDX mapping and XPS studies, were used to interpret its activation influence towards the HER.

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Section: -58mentioning

confidence: 99%

Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation

et al. 2017

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“…The band gap can be narrowed and light absorption extended to longer wavelengths by doping with non-metal atoms [21,22], with organic dyes [23] such as ruthenium complexes [24], porphyrins [25], or graphene oxide [26][27][28][29]. Another strategy to improve the PC efficiency relies on the use of hybrid metal nanoparticles/semiconductor nanostructures [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44], in order to reduce the electron-hole recombination and/or to harvest the visible light owing to plasmonic enhanced optical absorption [29,30,45]. Inorganic semiconductors based on transition-metal oxides, oxysulfides or oxynitrides with lower bandgap as compared to TiO 2 can also be used to increase the absorption of visible-light [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

Cure¹,

Cocq

Mlayah

et al. 2019

International Journal of Hydrogen Energy

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This work proposes a new efficient, long-lasting scalable and low-cost triptych photocatalyst by assembling a semiconductor thin film (planar anatase TiO 2), a photosensitive molecule (Cbz) of the carbo-benzene family and plasmonic Ag nanoparticles with exquisite degree of intimacy with the semiconductor. Under simulated sunlight conditions over 48 h, the triptych TiO 2 /Ag/Cbz photocatalyst allows a hydrogen production rate of 0.18 mmol.g photocatalyst-1 .h-1 in conditions of applicative pressure (2.2 bars) and temperature (ambient) suitable for commercial applications. A ternary synergy (~33%) for hydrogen production is clearly evidenced with the triptych material in comparison with the diptych counterpart. The role of each component (TiO 2 , Ag and Cbz) on the H 2 production is investigated systematically by discriminating the light absorption from the different materials and interfaces. We show how to achieve an efficient vertical Schottky junction between Ag nanoparticles and the TiO 2 substrate that is demonstrated to be of crucial importance in the water-splitting process.

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“…Figure 6(b) presents two characteristic peaks centred at 83.1 eV for Au (4f 7/2 ) and 86.7 eV for Au (4f 5/2 ) confirms the presence of the metallic structure of Au. 42,43 These two strong Au characteristic peaks suggest clearly the formation of the AuNPs on the rGO paper surface with good crystallization. The C 1s spectrum of AuNPs/rGO [ Fig.…”

Section: Resultsmentioning

confidence: 97%

“…The AuNPs/rGO paper included 83.7% C, 7.6% O, 6.6% I and 2.1% Au, whereas the AuTF/rGO paper contained 80.2% C, 8.9% O, 5.0% I and 5.9% Au. Figure (b) presents two characteristic peaks centred at 83.1 eV for Au (4f 7/2 ) and 86.7 eV for Au (4f 5/2 ) confirms the presence of the metallic structure of Au . These two strong Au characteristic peaks suggest clearly the formation of the AuNPs on the rGO paper surface with good crystallization.…”

Section: Resultsmentioning

confidence: 99%

Flexible gold nanoparticles/rGO and thin film/rGO papers: novel electrocatalysts for hydrogen evolution reaction

Topç̧u

Kıranşan

2019

J of Chemical Tech & Biotech

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BACKGROUND Fabrication of cost‐effective and durable materials for efficient hydrogen production in splitting water (hydrogen evolution reaction) is of importance for the successful utilization of hydrogen‐based green energy technologies. Therefore, electrocatalytic materials have been designed with a simple approach using electrodeposition of gold nanoparticles (AuNPs) and thin film (AuTF) directly on reduced graphene oxide (rGO) paper. As‐prepared paper electrocatalysts (AuNPs/rGO and AuTF/rGO) were characterized by X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). RESULTS Free‐standing and flexible AuNPs/rGO and AuTF/rGO electrocatalysts have exhibited excellent performances on HER with low Tafel slopes (88 and 112 mV dec−1), low onset potentials (−47 and −55 mV), small overpotentials of only −176 and −204 mV to drive 10 mA cm−2, respectively, and high durability even with the rolled design. The outstanding performance of these two electrocatalysts can be attributed to the uniform distribution of 20‐nm‐sized AuNPs and the deposition of well‐ordered AuTF on rGO paper, providing an increment in the surface area and an enhancement of the electron density. CONCLUSION The controllable design of AuNPs/rGO and AuTF/rGO electrocatalysts, together with their high flexibility, good stability and promising results, suggest potential use in future applications of H2 production in splitting water. © 2019 Society of Chemical Industry

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Cathodic activation of titanium-supported gold nanoparticles: An efficient and stable electrocatalyst for the hydrogen evolution reaction

Cited by 36 publications

References 66 publications

Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation

Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

Flexible gold nanoparticles/rGO and thin film/rGO papers: novel electrocatalysts for hydrogen evolution reaction

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Cathodic activation of titanium-supported gold nanoparticles: An efficient and stable electrocatalyst for the hydrogen evolution reaction

Cited by 36 publications

References 66 publications

Catalytic impact of alloyed Al on the corrosion behavior of Co50Ni23Ga26Al1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H2generation

Catalytic impact of alloyed Al on the corrosion behavior of Co50Ni23Ga26Al1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H2generation

A triptych photocatalyst based on the Co-Integration of Ag nanoparticles and carbo-benzene dye into a TiO2 thin film

Flexible gold nanoparticles/rGO and thin film/rGO papers: novel electrocatalysts for hydrogen evolution reaction

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Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation

Catalytic impact of alloyed Al on the corrosion behavior of Co₅₀Ni₂₃Ga₂₆Al_1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H₂generation