This article describes screening of an entire manganese/cobalt/tantalum/lead oxide composition space for catalytic activity and stability for water oxidation under PEM conditions using the scanning-droplet cell and high throughput catalyst discovery methodology.
This article describes the fundamentals of electrolysis and water splitting to generate green hydrogen. It discusses the role of catalysts as well as the differences between various technological implementations of electrolysis at the system level.
This article reports the performance of a low-cost, earth-abundant, water oxidation catalyst based on an oxide of nickel, manganese and antimony. The catalyst is stable and active under such conditions and is characterized spectroscopically.
This article describes the use of low-cost, earth-abundant catalysts for chlorine production under conditions typically used commercially in the chlor-alkali process. Studies of the bulk and surface of the electrocatalyst indicate minimal changes in structure and activity as a result of extended chlorine evolution under such conditions.
This article describes the construction and use of a novel instrument, the scanning droplet cell, to quantify the electrocatalysts millions of times more rapidly than alternative methods. The utility of the scanning droplet cell is also demonstrated in evaluating quantitatively the performance of large libraries of different materials combinations for water oxidation.
This article describes the novel use and implementation of high speed video-based characterization of the activity and stability of electrocatalysts based on the rate and size of the bubbles associated with evolved gas. The general approach is highly parallel and allowed identification of active catalysts from a library that contained 231 unique combinations of materials in less than one minute.
This article describes the use of a monolithically integrated device based on tandem semiconductor junctions protected by an amorphous titanium dioxide layer for the direct production of hydrogen and oxygen from water with sunlight as the only input. The system was stable and intrinsically safe with a solar-to-hydrogen efficiency in excess of 10% without producing electricity as an intermediate process step.
Role of Long-Duration Energy Storage in Variable Renewable Electricity Systems
The introduction of LDS lowers total system costs relative to wind-solar-battery systems, and system costs are twice as sensitive to reductions
in LDS costs as to reductions in battery costs. In least-cost systems, batteries
are used primarily for intra-day storage and LDS is used primarily for inter-season and multi-year storage. Moreover, dependence on LDS increases when the system is optimized over more years.
This article summarizes the key steps that have been taken towards delivering a fully functional solar fuels generator, which have exploited advances in nanotechnology at all hierarchical levels of device construction, and include the discovery of earth-abundant electrocatalysts for fuel formation and materials for the stabilization of light absorbers.
Rutile alloys in the Mn-Sb-O system
This article describes the discovery using high throughput experimentation of a family of active water oxidation catalysts based on the manganese antimony oxides. The rutile oxides have the same or better thermodynamic operational stability as iridium oxide under operational conditions but at a tiny fraction of the raw materials cost.