Jianan Erick Huang's research while affiliated with University of Toronto and other places

Publications (15)

Article
Full-text available
In alkaline and neutral MEA CO2 electrolyzers, CO2 rapidly converts to (bi)carbonate, imposing a significant energy penalty arising from separating CO2 from the anode gas outlets. Here we report a CO2 electrolyzer uses a bipolar membrane (BPM) to convert (bi)carbonate back to CO2, preventing crossover; and that surpasses the single-pass utilization...
Article
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Renewable electricity-powered CO2 reduction to multi-carbon (C2+) products offers a promising route to realization of low-carbon-footprint fuels and chemicals. However, a major fraction of input CO2 (>85%) is consumed by the electrolyte through reactions with hydroxide to form carbonate/bicarbonate in both alkaline and neutral reactors. Acidic cond...
Article
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CO 2 electrolysis is a promising technology that can utilize intermittent renewable electricity to mitigate CO 2 emissions. In conventional electrolyzers, most of the reactant CO 2 is lost to parasitic side reactions, limiting the electrochemical conversion of CO 2 into valuable products. Here, we present a microchanneled solid electrolyte that int...
Article
The electroreduction of CO2 (CO2R) is the conversion of CO2 to renewable fuels and feedstocks, a promising technology that could support the transition from fossil to renewable sources in the chemical industry. Today the viability of CO2R technology is limited by carbonate formation via the reaction of reactant CO2 with hydroxides and the energy co...
Article
The electrochemical CO2 reduction reaction (CO2RR) provides a route to store intermittent electricity in the form of fuels like methane. We reasoned that disrupting C-C coupling while maintaining high ∗CO coverage could enhance methane selectivity and suppress the hydrogen evolution reaction (HER). We studied the effect of doping CuAl, a material a...
Article
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The electrochemical production of ethylene oxide (EO) from CO2, water and renewable electricity could result in a net consumption of CO2. Unfortunately existing electrochemical CO2-to-EO conversions show impractical Faradaic efficiency (FE) and require a high energy input. Here we report a class of period-6-metal-oxide-modified iridium oxide cataly...
Article
Electrochemical reduction of carbon dioxide (CO2RR) converts intermittent renewable energy into high energy density fuels, such as ethanol. Membrane electrode assembly (MEA) electrolyzers are particularly well-suited for CO2-to-ethanol conversion in view of their low ohmic resistance and high stability. However, over 75% of the ethanol produced at...
Article
Full-text available
Carbon dioxide electroreduction (CO 2 R) is being actively studied as a promising route to convert carbon emissions to valuable chemicals and fuels. However, the fraction of input CO 2 that is productively reduced has typically been very low, <2% for multicarbon products; the balance reacts with hydroxide to form carbonate in both alkaline and neut...
Article
Full-text available
The electrochemical conversion of CO 2 to methane provides a means to store intermittent renewable electricity in the form of a carbon-neutral hydrocarbon fuel that benefits from an established global distribution network. The stability and selectivity of reported approaches reside below technoeconomic-related requirements. Membrane electrode assem...
Article
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The electrochemical conversion of CO2 produces valuable chemicals and fuels. However, operating at high reaction rates produces locally alkaline conditions that convert reactant CO 2 into cell-damaging carbonate salts. These salts precipitate in the porous cathode structure, block CO2 transport, reduce reaction efficiency, and render CO2 electrolys...
Article
Full-text available
Electroreduction uses renewable energy to upgrade carbon dioxide to value-added chemicals and fuels. Renewable methane synthesized using such a route stands to be readily deployed using existing infrastructure for the distribution and utilization of natural gas. Here we design a suite of ligand-stabilized metal oxide clusters and find that these mo...
Article
Full-text available
There is significant interest in developing efficient electrochemical processes for commodity chemical manufacturing, all directly powered by renewable electricity. A vital chemical is ethylene glycol, with an annual consumption of around 20 million tonnes due to its use as antifreeze and as a polymer precursor. Here we report a one-step electroche...

Citations

... Sargent et al. (Zhong et al., 2020) identified a Cu-Al catalyst using density functional theory calculations in combination with active machine learning, which efficiently reduced CO 2 to C 2 H 4 with a high FE over 80%. Very recently, A.S. Rasouli et al. synthesized porous Ga-doped CuAl catalysts able to disrupt carbon-carbon coupling and shift the selectivity from C 2 H 4 to CH 4 while maintaining low hydrogen evolution activity (Sedighian Rasouli et al., 2022). ...
... The blue PeLEDs have obtained decent EQEs over 13%, and there is still a huge potential for further improvement. 10,11 However, the stability of PeLEDs does not match the progress acheived in the rapid improvement in EL efficiency, impeding practical application in the display field. To the best of our knowledge, the highest operational lifetimes T 50 (the time taken by PeLEDs to decay to 50% of their initial luminance (L 0 ) or EQE) of PeLEDs with an initial luminance of 100 cd m −2 were measured to be thousands of hours, lagging far behind the well-developed OLEDs and QLEDs with T 50 beyond 1 000 000 h at 100 cd m −2 . ...
... 106 Very recently, the synergistic electric-thermal field has been used to accelerate the CRR toward the C 2+ products. 107 However, there are few studies on the effects of the external fields on the CRR activity and selectivity from the perspective of tuning the local microenvironment. (6) Currently, a high FE for C 2+ products usually requires a robust alkaline solution, which can consume a large number of CO 2 molecules to form carbonates, thereby decreasing the energy efficiency of CRR. ...
... In recent years, research on eCO 2 RR has yielded remarkable progress. Most of these advances focus on the design of catalysts, 44-49 the construction of reaction devices, [50][51][52][53] and the discussion of reaction mechanisms. [54][55][56][57] The industrial applications provide a new dimension for research on eCO 2 RR. ...
... The CO 2 reactant is provided by two sources: the inlet CO 2 flow (gas) and the regenerated CO 2 (dissolved form, aq.) in the catholyte. To achieve high SPU, it is necessary to restrict the gaseous CO 2 feed 13,14 . Under a restricted gaseous CO 2 availability, the cathode CO 2 supply relies more on regeneration (SI1): in an ideal case with 100% SPU and 100% C 2+ selectivity, regeneration contributes 75% of the consumed CO 2 . ...
... Nonetheless, under these reaction conditions, most CO2 species are consumed by reacting with alkaline electrolyte or dissolving in water, due to their much faster reaction kinetics than the sluggish CO2RR. For example, the theoretical maximum CO2 conversion efficiency was calculated less than 50% in a strong alkaline aqueous electrolyte [17], which further drops quickly at lower CO2 concentrations. ...
... Modifying the *CO adsorption on Cu has been reported to enable the optimization of reaction kinetics for OC−COH coupling. 16 Meanwhile, lowering the Cu coordination facilitates *CO adsorption 20 and hydrogenation to COH, 21 which are essential for the OC− COH pathway. Thus, we hypothesize that controlling the *CO adsorption via tuning the coordination numbers (CNs) of Cu is likely to facilitate the OC−COH coupling. ...
... 6,10,11 Both these issues originate from the strong reliance of MEA electrolyzers on alkali cations (e.g., K + ) for active CO 2 R. 10 Only a few engineering solutions have been reported to resolve these critical issues, including (i) using pure water as the anolyte with the periodic injection of salt solutions to the cathode, 5 (ii) periodic flushing of the GDE with pure water to wash away the salts, 6 or (iii) alternating cell voltages to minimize OH − concentration at the interface. 12 However, these approaches all involve unsteady-state and periodic interventions that disrupt electrolyzer operations, which lead to poor overall process efficiency, increased complexity of process control infrastructure, and increased costs. ...
... 28,29 Therefore, creating a multisite catalytic system through doping and coupling foreign atoms, hydroxide, or ligands is highly desirable to boost the CO 2 reduction reaction (CO 2 RR) activity. 30 Herein, we provide a rational strategy to design a multisite catalyst for highly selective CO 2 methanation. Specifically, an Ir single-atom (Ir 1 ) doping strategy is used to induce a nucleophilic attack of water, which accelerate water dissociation due to the abundant electrophilic oxygen species. ...
... At a potential above 0.4 V, there is a renewed increase in the current density, perhaps due to an activation of the PdO surface at high potentials. The activity of Pd at a potential of 1.299 V was recently observed (1.1 V vs. Ag/AgCl for ethylene oxidation to ethylene glycol [48]). In the reverse scan, a new peak appears at -0.05 V, corresponding to the reactivation of the Pd surface by the reduction of the PdO layer. ...