An artificial leaf device built with earth-abundant materials for combined H₂ production and storage as formate with efficiency > 10%

Abstract

A major challenge for achieving the energy transition and transforming the current energy model into distributed production is the development of efficient artificial leaf-type devices capable of directly converting carbon...

Highly Durable Nanoporous Cu2–xS Films for Efficient Hydrogen Evolution Electrocatalysis under Mild pH Conditions

“…In this context, electrocatalysts based on non-critical materials are attracting increasing attention to replace Pt and Ru to scale-up green H 2 production. − In particular, Cu chalcogenide and oxide electrocatalysts are interesting due to their remarkably low overpotentials (η) and stability compared to other transition metal catalysts toward HER. − Outstanding η values, as low as ∼50 mV at 10 mA cm –2 , have been reported when Cu chalcogenides are heterostructured and tested under extreme pH conditions (see Table S1 for electrode benchmarking) . To reduce manufacturing costs and to simplify electrode architectures, non-heterostructured Cu 2 S electrodes are appealing to optimize.…”

Iron oxide-promoted photochemical oxygen reduction to hydrogen peroxide (H2O2)

“…ammonia or formic acid). 19–29 Pure H 2 stored in a tank at 35 MPa (room temperature) delivers 2.8 MJ L −1 when operated in a fuel cell, which is very similar to the energy density of aqueous H 2 O 2 (70 wt%) with 3.1 MJ L −1 . 30,31 Thus H 2 O 2 , being fully soluble in water, offers an easy-to-handle liquid fuel alternative achieving safer operation, storage and transportation.…”

Advanced (photo)electrocatalytic approaches to substitute the use of fossil fuels in chemical production

“…It represents a scheme for an artificial leaf device built with earth-abundant materials for combined H 2 production and storage as formate with solar-to-fuel efficiency >10%. 177 The PEC unit, schematically shown in Fig. 12(b), has a highly compact design, amenable to scale-up, and is integrated with gas diffusion electrodes based on Cu–S for CO 2 reduction and Ni–Fe–Zn oxide for water oxidation.…”